Itchy red spots on the arms may be related to insect bite dermatitis, pityriasis rosea, periorbital keratosis and so on.
1. insect bite dermatitis: mostly due to insect bites, by the insect body powder hair or venom stimulation, and caused by local skin allergies and inflammation, resulting in red spots on the arm with itching.
2. pityriasis rosea: this disease is mostly a viral infection, such as human herpes virus, in addition to the cellular immune response also plays a role in this disease. When the virus enters the body, it causes localized skin rashes with itching.
3. Perifollicular keratosis: due to abnormal keratinization of the epidermis at the mouth of the sebaceous gland of the hair follicle, resulting in the occlusion of the pore. Performance of red small papules scattered distribution on the arm, part of the self-conscious mild itching.
Itchy red spots on the arm can also be seen in other causes, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions for the relevant examination, with the help of a doctor to clarify the nature and targeted treatment or treatment, do not blindly deal with their own.