After eating seafood, acne appeared on the face, which is generally considered as allergic dermatitis, because seafood contains a lot of histamine, which can easily stimulate the human body and cause allergic diseases, such as erythema, papules and nodules on the skin, accompanied by itching and discomfort.

Extended information:

Seafood allergy is an allergic disease, which can be divided into acute and chronic diseases. Patients with acute seafood allergy should pay strict attention to diet and avoid spicy, seafood and other foods; Patients with chronic seafood allergy will get worse after eating certain foods.

Patients with chronic seafood allergy should be desensitized to allergens in time. In addition, patients should avoid scratching the affected part strongly, scalding with hot water and topical irritant drugs, and avoid eating animal protein food and seafood hair.

People often have a special kind of poisoning after eating seafood, which is characterized by allergic symptoms such as itchy skin, redness and edema. However, these people may only be sensitive to certain fish. If you do subcutaneous experiments or monitor that there is no allergic reaction to eating seafood, you can still eat alternative fish or seafood without rejecting all seafood.

The reason of seafood allergy is that seafood is rich in a large number of heterogeneous proteins, which directly or indirectly activate immune cells, cause the release of chemical mediators, and then produce a series of complex biochemical reactions. When antibody and antigen work together, the human body will show allergic symptoms.

If you suspect that you are allergic to a certain food, you can go to the hospital to test the allergen, or another simple test can help you. Record your pulse after eating food that you think is problematic, so that you can know whether you are having an allergic reaction. Take a watch in one hand and sit down and rest for a few minutes.

When you completely relax yourself, measure the pulse of your wrist and count the number of pulse beats within 6 seconds. The normal pulse rate is 52-7 beats per minute. After that, eat the food you suspect will cause allergies, wait for 15-2 minutes, and then take your pulse. If your pulse (per minute) increases more than 1 times, you should ban this food for one month, and then take the test.

Reference: Baidu Encyclopedia-Seafood Allergy