Erythema of the arm is obvious when the weather is hot and may be caused by pathological factors such as dermatitis eczema, lichen planus or cholinergic urticaria, etc. It can generally be treated by medication, such as the application of glucocorticosteroids such as hydrocortisone butyrate cream and antifungal drugs such as amorphophallus cream.
1. Dermatitis eczema: hot weather accompanied by strong ultraviolet radiation can easily lead to inflammatory dermatosis of the epidermis and superficial dermis of the arm, resulting in obvious erythema. Generally treated by medication, such as topical hydrocortisone butyrate cream and other glucocorticoid drugs.
2. lichen planus: by malassezia and other fungal infections caused by damage to the stratum corneum of the skin, if the hot weather arm skin oil secretion will further lead to severe erythema, generally through drug treatment, such as topical amorolfine cream or oral itraconazole and other antifungal drugs.
3. Cholinergic urticaria: hot weather leads to cholinergic nerve excitation, histamine levels rise, causing arm skin erythema, generally oral levocetirizine hydrochloride and other anti-allergic drugs for treatment.
Erythema of the arm is obvious when the weather is hot, there may be other reasons, it is recommended to go to the regular hospital in a timely manner. The above medication should be used in accordance with the doctor’s instructions, do not self-medication.