Red spots on the back of the feet may be caused by eczema, allergic purpura, contact dermatitis, etc., and you should consult a doctor in time to clarify the cause.
1. Eczema: a kind of skin inflammation reaction with intense itching caused by many internal and external factors, the cause of which is still unclear and may be related to genetic factors, immune abnormalities, etc. It will lead to red spots on the back of the feet, which may be accompanied by blisters, oozing and other symptoms, and the itching is usually intense.
2. Anaphylactic purpura: erythema on the dorsum of the feet may also be caused by anaphylactic purpura due to metaplastic inflammation of small blood vessels, and abdominal pain, arthralgia, and history of upper respiratory tract infections 1-3 weeks before the onset of the disease.
3. Contact dermatitis: acute or chronic inflammatory reaction at the contact site due to contact with certain allergenic substances, such as contact with pollen, wearing socks that have not been worn before, etc., can also lead to erythema on the instep, accompanied by pimples, itching and other symptoms.
Erythema on the dorsum of the feet may have other causes, it is recommended to go to the hospital in time to clarify the cause of the disease, and follow the doctor’s instructions to standardize the treatment.