1, eczema, mainly due to allergies, may be due to contact with laundry detergent, detergents and other chemicals, or due to exposure to ultraviolet radiation caused by allergies, in the emergence of small red dots at the same time can be accompanied by itching sensation. Clinical treatment can be oral levocetirizine hydrochloride tablets, 5 mg / times, 1 time / day, with the topical use of Dinaid cream foam, 2 times / day.

2, for the second stage of syphilis rash, there can be macules or papules, copper-red, can be slightly itchy, through the laboratory syphilis serology can be clearly diagnosed. It is due to unclean sex infection, clinical treatment requires intramuscular injection of benzylpenicillin.

3, papular syphilis, macular syphilis and precursor symptoms should first be examined in detail in the hospital, and then according to the examination report to prescribe symptomatic drugs, usually should pay more attention to smoking and drinking. Develop good eating habits.

4, it may be due to purpura type of disease, resulting in purpura has a variety of reasons, including thrombocytopenia and poor coagulation function of the patient, there is also a kind of allergic purpura, allergic purpura patients will be in the arm of the red dot symptoms.

Expanded information:

Precautions:

1, don't go to the scratch: the general people for the skin itchy intuitive response is to rush to the hand to scratch, but you may be Do not know, this action not only can not stop the itch, but also may be more itchy, mainly because when you scratch the local itch, but let the local temperature increase, so that the blood release more histamine (allergens), but will be more deterioration.

2, don't use hot compresses: some people want to use hot compresses when they are itchy, although the heat can make the local itch temporarily less sensitive, but in fact it is another kind of stimulation, because the heat will make the blood vessels dilate, releasing more allergens, such as immersed in the overheated hot springs or bath tubs, or wrapped in a heavy quilt to keep warm in the transition are very likely to trigger urticaria.

Avoid foods with artificial additives and eat more fresh fruits and vegetables. Eat less fried, deep-fried or spicy foods that are likely to trigger a heat response in the body.