Itchy body, a scratch on the red marks to consider allergic diseases, such as cholinergic urticaria, etc.; can also be due to mental tension, stress. Examples of allergens are as follows: 1, contact with shrimp, crab, scallops and other seafood; 2, contact with bark, willow, animal fur, mold and so on; 3, nut foods. Clinical treatment of commonly used drugs are as follows: 1, can be taken orally avastin capsules, lupatadine fumarate tablets, serious cases can be taken orally compound glycyrrhizin capsule; 2, topical medication can be coated with menthol lotion; 3, accompanied by abdominal pain, diarrhea and other manifestations of oral omeprazole tablets.