To fundamentally treat allergic dermatitis, it is essential to first clarify the cause and identify which allergen triggers it to avoid contact. In terms of treatment, it often involves a combination of oral and topical medications. Oral medications typically include antihistamines, such as loratadine dispersible tablets, cetirizine tablets, or fexofenadine hydrochloride tablets. These can be supplemented with compound glycyrrhizin tablets or vitamin C tablets, calcium gluconate, or treatment based on Traditional Chinese Medicine differential diagnosis. For topical use, corticosteroid ointments or calcineurin inhibitors can be chosen to help. Regular skin care is crucial, using moisturizing lotions to maintain the barrier function of the skin, making it less susceptible to irritation and reducing the chance of recurrent allergic dermatitis. (Medication should be used under the guidance of a physician.)