Contact allergic dermatitis- how to cure this?

[Palash]

Hello, an 82-year-old male presented with rash, burning, and itching on both knees. The patient had applied M. Radix sap to his knees for arthralgia for 3 consecutive days, and the lesions appeared on the fourth day. He denied any prior contact with M. Radix. The patient had gonarthrosis but was otherwise healthy. Dermatological examination findings were normal except for erythematous, edematous, and scaly plaque lesions exceeding the borders of the area on which the M. Radix sap had been applied. How to treat this?

[maya]

@palash Herb-related adverse effects may cause a wide range of health problems, including life-threatening reactions, multisystemic diseases, and increased hospitalization rates. Many cutaneous adverse effects secondary to herbs have been reported, including allergic and irritant contact dermatitis, Stevens-Johnson syndrome, anaphylaxis, photosensitivity, and pellagra. Irritant phytocontact dermatitis, allergic phytocontact dermatitis, or phytophotocontact dermatitis may occur after the topical application of certain plants.