Allergies like rashes on my body

Patient: Hello.. i sit in a chair when i was doing bath. it is an old chair and after bath my body which touched chair began to itch and red rashes on that place now. what medicine should i use now?

Symptoms: Itching

Doctor: You may use a moisturizer with or without a corticosteroid, for local application. It is a temporary reaction and will s ubside soon. Avoid using the same old chair again.