Masahiko Toyoda (dermatologist accredited by the Japanese Dermatological Association) Possible causes of itchy hands There are many causes of itchy hands, such as hand eczema, blastomycotic interdigital erosions, contact dermatitis, hand White tinea, palmoplantar pustulosis, sweat herpes, dyshidrotic eczema, metal allergy or chilblains, etc. We often use our hands to come into contact with various external organs. The hands are also the parts that most directly feel the temperature difference between cold and warm. Therefore, these factors must also be included in the diagnosis for diagnosis. (Editor’s recommendation: Dry, cracked and stinging hands! Founder of Moisture Therapy: Apply this before going to bed and wake up and it’s all gone) Example 1 Inferring eczema on hands from dry and itchy hands. People who often come into contact with water at work usually have dry and dehydrated hands. If you experience rashes, redness or itching, you may be suffering from hand eczema. Symptoms: Hand eczema generally refers to the symptoms of dermatitis on the palms or fingers of the hands due to contact with bacteria. In more severe cases, "progressive palmar keratosis" in which the skin becomes hardened, cracked, painful and oozing blood will occur. This is the common housewife’s eczema (commonly known as rich hand), which is most common in aquatic fishery operators, beauty and hairdressing industries, medical personnel and other employees who need to frequently come into contact with detergents, disinfectants or water. In recent years, there have also been many full-time people who take care of children at home. Dad suffers from rich man's hand. (Editor's recommendation: You can be rich even if you don't do housework! These daily necessities may be the culprit) Causes The causes are mostly related to the detergents you usually come into contact with. In addition, friction on the skin caused by frequent wiping of hands or twisting towels is also one of the reasons. The handling method should be to use a milder and non-toxic detergent or dilute it before use; alternatively, you can also use transparent waterproof gloves to directly isolate it. However, gloves made of rubber are easy to irritate the skin, so pay special attention when selecting them. As for the temperature of the water it comes into contact with, it is not good to be too hot or too cold. Please keep the water temperature moderate to avoid injuries. In addition, after touching water or detergent, please apply hand cream to moisturize and perform muscle activity thoroughly. Also, because low temperatures can aggravate hand eczema, remember to wear gloves to keep out the cold when it’s cold. If the itching is really unbearable, you can refer to the method of cooling the affected area to relieve itching; if scratching is severe at night, it is recommended to use wet compresses to isolate the itching. If it worsens into "progressive palmar keratosis", the ointment may not easily penetrate into the thick skin tissue. In this case, you may wish to use the "soaking & moistening" technique, first soaking in warm water for about 20 minutes, and then apply it after the cuticles on the hands have softened. The medicine will be better absorbed. This soothing method is ideal for progressive palmar keratosis. Q&A on improving hand eczema. In our hospital alone, more than 30 patients suffer from hand eczema every day, which is a considerable proportion. Since there are many special cases that cannot be treated in the same way as ordinary methods, we have specially created a Q&A unit to explain them in detail. I hope it will be helpful to everyone. Q: Usually the palms are commonly used for housework, but why does eczema appear on the back of the hands? A: "Compared with the palms, the skin and stratum corneum on the back of the hands are thinner and lack natural moisturizing factors, so the barrier function against external bacteria is weaker." Q: Originally, the palms were covered with blisters, accompanied by suppuration and intense itching. After it became chronic, the skin hardened to the point where even the fingerprints disappeared, but it no longer itched and I felt much more comfortable. Why is this happening? A: "It is true that the itching will not recur as the hand eczema worsens, but the symptoms will also turn into cracked and bleeding fingertips, which will become more painful. Many people cannot bend their fingers because of this. If you work in catering, beauty salons, or bank clerks, etc. Occupation has a huge impact on work. This is not just a matter of itching or not, because it affects the whole life, so it must be treated carefully to prevent it from getting worse." Q: Why does eczema only appear on certain fingers? A: "Although it is not common, there are still some cases where eczema only appears on the ring finger of the left hand, and is quite difficult to treat. The reason is usually related to the wedding ring worn. Skin with eczema is very sensitive to acne. In addition, If you are often exposed to water, detergents and sweat at work, the skin that has been in contact with the ring for a long time is likely to be irritated by trace amounts of dissolved metal substances, resulting in metal allergies and eczema. The residue of detergent in the gap between the ring and the finger can also cause eczema. One of the reasons is that it is best to remove the ring before washing hands or working.

Masahiko Toyota (dermatologist accredited by the Japanese Dermatology Association) There are many possible causes of itchy hands. There are many causes of itchy hands, such as hand eczema, blastomycosis interdigital erosion, contact dermatitis, vitiligo of the hands, palmar and soles Impetigo, dyshidrotic eczema, dyshidrotic eczema, metal allergy or chilblains, etc. We often use our hands to come into contact with various external organs. The hands are also the parts that most directly feel the temperature difference between cold and warm. Therefore, these factors must also be included in the diagnosis for diagnosis. (Editor’s recommendation: Dry, cracked and stinging hands! Founder of Moisture Therapy: Apply this before going to bed and wake up and it’s all gone) Example 1 It is inferred from dry and itchy hands that people with hand eczema often come into contact with water at work, and their hands are usually dry and dehydrated. If you experience rashes, redness or itching, you may be suffering from hand eczema. Symptoms: Hand eczema generally refers to the symptoms of dermatitis on the palms or fingers caused by contact with hands. In slightly more severe cases, "progressive palmar keratosis" in which the skin becomes hardened, cracked, painful and oozing blood will occur. This is the common housewife’s eczema (commonly known as rich hand). It occurs most often in aquatic fishery operators, beauty and hairdressing industries, medical personnel and other employees who need to frequently come into contact with detergents, disinfectants or water. In recent years, there have also been many full-time people who take care of children at home. Dad suffers from rich man's hand. (Editor’s recommendation: You can be rich even if you don’t do housework! These daily necessities may be the culprit) Causes The causes are mostly related to the detergents you usually come into contact with. In addition, friction on the skin caused by frequent wiping of hands or twisting towels is also one of the reasons. The handling method should be to use a milder and non-toxic detergent or dilute it before use; alternatively, you can also use transparent waterproof gloves to directly isolate it. However, gloves made of rubber are easy to irritate the skin, so pay special attention when selecting them. As for the temperature of the water it comes into contact with, it is not good to be too hot or too cold. Please keep the water temperature moderate to avoid injuries. In addition, after touching water or detergent, please apply hand cream to moisturize and perform muscle activity thoroughly. Also, because low temperatures can aggravate hand eczema, remember to wear gloves to keep out the cold when it’s cold. If the itching is really unbearable, you can refer to the method of cooling the affected area to relieve itching; if scratching is severe at night, it is recommended to use wet compresses to isolate the itching. If it worsens into "progressive palmar keratosis", the ointment may not easily penetrate into the thick skin tissue. In this case, you may wish to use the "soaking & moistening" technique, first soaking in warm water for about 20 minutes, and then apply it after the cuticles on the hands have softened. The medicine will be better absorbed. This soothing method is ideal for progressive palmar keratosis. Q&A on improving hand eczema. In our hospital alone, more than 30 patients suffer from hand eczema every day, which is a considerable proportion. Since there are many special cases that cannot be treated in the same way as ordinary methods, we have specially created a Q&A unit to explain them in detail. I hope it will be helpful to everyone. Q: Usually the palms are commonly used for housework, but why does eczema appear on the back of the hands? A: "Compared with the palms, the skin and stratum corneum on the back of the hands are thinner and lack natural moisturizing factors, so the barrier function against external bacteria is weaker." Q: Originally, the palms were covered with blisters, accompanied by suppuration and intense itching. After it became chronic, the skin hardened to the point where even the fingerprints disappeared, but it no longer itched and I felt much more comfortable. Why is this happening? A: "It is true that the itching will not recur as the hand eczema worsens, but the symptoms will also turn into cracked and bleeding fingertips, which will become more painful. Many people cannot bend their fingers because of this. If you work in catering, beauty salons, or bank clerks, etc. Occupation has a huge impact on work. This is not just a matter of itching or not, because it affects the whole life, so it must be treated carefully to prevent it from getting worse." Q: Why does eczema only appear on certain fingers? A: "Although it is not common, there are still some cases where eczema only appears on the ring finger of the left hand, and is quite difficult to treat. The reason is usually related to the wedding ring worn. Skin with eczema is very sensitive to acne. In addition, If you are often exposed to water, detergents and sweat at work, the skin that has been in contact with the ring for a long time is likely to be irritated by trace amounts of dissolved metal substances, resulting in metal allergies and eczema. The residue of detergent in the gap between the ring and the finger can also cause eczema. One of the reasons is that it is best to remove the ring before washing hands or working. "Treatment must be solid and cautious, and do not give up halfway. Q: Why does hand eczema always recur in the same place? A: "Even if it seems to be healed on the surface, the internal inflammation of the skin has not completely subsided, and eczema can easily reoccur. This is a very common situation. Therefore, please cooperate with the doctor's instructions and receive treatment patiently, and do not rush.

” Q: Why is only one hand rough and cracked, but the other hand is completely fine? A: "This may be related to the cleaning method and which hand you use. For example, when washing dishes, you are accustomed to holding a sponge and touching dishwashing liquid with your left hand; or eczema only appears on the right hand that often holds the handle of a kitchen knife; in addition, the grip leather of a badminton racket People who use one hand to care for plants or do gardening work are also prone to symptoms of one-handed dermatitis. "Q: Skin itching tends to worsen before women's menstruation. Why? A: "Female hormones can be divided into two types: estrogen and progesterone. Estrogen secretion helps stabilize the skin and maintain moisture; progesterone can cause excessive secretion of sebum, causing various skin problems. Before the menstrual period, it is important to It is the peak of progesterone secretion, so it cannot be ruled out as one of the factors that accelerates the worsening of eczema and frequent acne breakouts.” Q: I had atopic dermatitis as a child. Although it was generally cured as an adult, the skin on my hands still often suffers from the condition. It still can’t be cured, why is this happening? A: "Patients with atopic dermatitis are genetically affected and their skin barrier function is usually weak. In addition, they need to use their hands for a long time for work, housework or taking care of children, and the skin lacks sufficient sebum moisture, which will cause dry hands. The roughness and discomfort recur repeatedly. It is recommended to follow the key points of muscle activity and take good care of your hands." (Editor's recommendation: Atopic dermatitis keeps itching! The skin is itchy and rashes. How to relieve itching and treat atopic dermatitis?) Redness, swelling and itching between the fingers are inferred to be blastomycotic interdigital erosion. Redness and itching between the fingers are likely to be blastomycosis interdigital erosion caused by the proliferation of Candida in the gaps between the fingers. In severe cases, peeling and ulceration may occur. How to deal with it: If there is residual moisture on your fingers, it will be an excellent breeding ground for mold to grow. Therefore, be sure to dry your hands after touching the water and keep them dry. As the middle finger and ring finger are thinner, moisture easily accumulates, and inter-finger erosion is also common here. ? Candida belongs to the normal flora of the human body and is also commonly found on pillows, sofas, curtains, or attached to the surfaces of daily necessities such as dolls. Therefore, in order to prevent your home from becoming a conducive environment for mold breeding, you must pay more attention to hygiene and do a good job of cleaning. Candida is easy to clean and does not tolerate drying, so it can be effectively eliminated by using the sun or a dryer. This type of mold also needs to accumulate to a certain number of bacteria before it can become a pathogen. Example 3 Rash and itching on hands Inference 1 Contact dermatitis (eczema) Some patients do not often touch water but develop redness, swelling, itching and rashes on their hands, which is the so-called "eczema". In severe cases, symptoms such as tissue fluid exudation, desquamation, and epidermal cracking and bleeding may even occur. It is precisely because our hands often come into contact with a variety of objects and external substances, including oils, water, fruits and vegetables, detergents, cosmetics and skin care products, medicines, plastic gloves, leather products, metals...etc., that The range of triggers for eczema is even more endless. For triggering factors that are easier to detect, such as things that cause itchiness, redness, or rashes when touched, you can temporarily stop contact and observe whether the symptoms are relieved. (Editor’s recommendation: A sudden red rash on the neck is actually cancer metastasis! These skin abnormalities are not just eczema) But not all eczema triggers are so obvious. At this time, it is necessary to conduct a patch test through a dermatology department to further find out. Allergens. In terms of treatment, the principle is still to avoid allergens, combined with solid muscle activity habits and daily hand care. If the condition is more serious, you must also seek professional diagnosis and follow the instructions. Inference 2: White ringworm of the hands (tinea manuum): A small number of patients who also have red, swollen, itchy hands accompanied by eczema belong to "white ringworm of the hands". This is a symptom of dry, rough skin, rashes and itching caused by white fungus infection on the skin of the hands. However, the symptoms are not obvious at first, so it can easily be misdiagnosed as eczema. Also because patients often think it is eczema and apply medicine randomly, so the more they apply it, the worse it gets, so they have to pay attention. A major characteristic of white ringworm on the hands is that symptoms often only appear on one hand. Although this condition is relatively uncommon, if you notice anything unusual, you should seek medical attention as soon as possible. This article is excerpted from "Save Your Own Skin!" 》／Toyota Masahiko (dermatologist certified by the Japanese Dermatology Association)／Apple House