Itchy rash on the inside of the arm can be caused by eczema, urticaria and insect bite dermatitis.
1. Eczema: due to allergic patients with inner arm skin contact with pollen, dust mites and other allergenic substances, or by sunlight, hot water scalding and other external factors, triggering the body to produce an allergic reaction, which triggered eczema, resulting in inner arm rash and itchy symptoms.
2. Urticaria: the inner arm skin due to allergies, infections and other factors make the skin mucous membrane small blood vessel dilation and increased permeability, resulting in limited edema reaction, can lead to the inner arm skin rash, accompanied by itching symptoms.
3. Insect bite dermatitis: If the inner arm is bitten by mosquitoes, due to the mosquito bite saliva into the body can cause an allergic reaction, which may lead to the inner arm skin rash and itchy symptoms.
If the patient’s inner arm rash and itchy, it is recommended to go to the hospital in a timely manner, after a clear cause of targeted treatment.