Severe itching after bathing or sweating without any visible rash can be due to conditions like Cholinergic urticaria or dry-skin?related itching. Use lukewarm (not hot) water, apply a good moisturizer immediately after bathing, wear loose cotton clothes, and avoid excessive heat or sweating triggers. You can take an antihistamine like Cetirizine once daily for relief. If the itching is very intense, persistent, or associated with other symptoms, consult a doctor to rule out underlying causes and get proper treatment.