Redness, swelling, itching on the body to consider the following conditions: 1, urticaria: can appear in different sizes and shapes of the wind, redness and swelling of the skin and mucous membrane areas, in terms of etiology is mainly due to bacterial, viral infections caused by Helicobacter pylori infection, there is also a part of it is due to endocrine disorders, such as hypothyroidism, hyperthyroidism, and part of it is due to allergies such as Contact with pollen, tree hair, willow floss, and some patients are suffering from severe renal failure, liver failure, coronary heart disease, etc. 2, papular urticaria: it is triggered by allergy to mosquito bites.