Symptoms of skin allergies caused by eating shrimp include redness, itching and redness of the skin, pain, and impaired blood circulation. Treatment is usually through the use of some antihistamines. The details are as follows: Skin allergy is a kind of perverse reaction of the body of a person to an allergen. Symptoms of skin allergy caused by eating shrimp generally include redness, itching, redness and swelling of the skin, pain, and blood circulation disorders. Allergic mediators such as histamine play a direct and important role in the development of acute allergic reactions. It can be treated with some antihistamine drugs such as loratadine as prescribed by the doctor. Once skin allergy occurs from eating shrimp, stop eating it immediately, seek medical advice and treatment under doctor’s supervision.