What causes itching on the arms?

Too general: You need to be more specific - do you have a rash?

Itchy arms: Causes of itchy arms includes dry skin, skin conditions like eczema, psoriasis, scabies, nerve disorders, irritation from wool, chemicals, soaps and other substances, allergic reactions, medications but they usually cause widespread itching. Treatment depends on the cause of the itching.

Many possibilities: There are many things that could cause the skin to itch. Several types of inflammatory conditions of the skin, allergic reactions, and sometimes bacterial, viral or fungal infections can cause rashes on the skin. Insect bites can also be the cause of a rash on the skin. Have it evaluated by a professional and get the appropriate treatment.

Keratosis pilaris: A very itchy rash that is commonly found on the arms is keratosis pilaris. Discuss problem with dermatologist it is benign in nature.