Elderly people with swollen feet and especially itchy consider urticaria, contact dermatitis, skin small vessel disease.
1. urticaria: urticaria occurs and food, drug allergies and infections and other factors, but also with some autoimmune factors, mainly the emergence of wind and angioedema, most of them will be accompanied by itching symptoms.
2. Contact dermatitis: contact dermatitis is the skin contact with external substances, because of irritation and allergies and other inflammatory reactions, mainly manifested as erythema, swelling, pimples, blisters, and even blisters, the general scope of the lesions and the contact with the material is generally consistent with the border is relatively clear.
3. Skin small vessel disease: this is simply involved in the dermal small blood vessels of vascular inflammatory diseases, the cause is not particularly clear, considering and infection, drugs, tumors, chemical substances, etc., the pathogenesis and small blood vessels in the deposition of immune complexes related to a kind of allergic reaction.
Older people with swollen feet and especially itchy may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or standardized treatment.