Causes of itchy skin bumps are as follows: 1, the skin itself disease itch: common causes such as atopic dermatitis, eczema, maculopathy, urticaria, itchy rash, etc., have very intense itching; 2, external factors leading to itching: external factors are very many, such as contact with glass fibers, peach hair, etc. caused by irritant dermatitis; contact with paint, glue, cosmetics, metal, etc. caused by allergic contact dermatitis;. Parasites such as scabies caused by scabies, lice, etc. can trigger intense itching; at this time, the skin will also have corresponding changes; 3, itching caused by visceral lesions: liver, kidney, endocrine, tumors, etc. can cause chronic persistent itching, the skin does not necessarily have a rash; 4, drug itching: mainly caused by the use of drugs. It should not be ignored; 5, neurological, psychiatric pruritus: the nervous system, including brain lesions can cause pruritus; simple mental illnesses such as delusional disorder, can also cause. The treatment of itching should not simply stop itching, but should carefully find the causes from the above five aspects. Spring is prone to itchy skin, and if you are not sure what causes your symptoms to react, please consult a professional doctor at the hospital to develop treatment measures for the cause.