<s>[INST] Hi doctor, I have a red rash since I was in the public pool and spa. It is like a round shape, but comparing with the pictures of fungal infection, it is not like that. Last night I put garlic juice on it but till the morning I had terrible itching and growing in double size. Can you please help me what can that be? [/INST] Hi. It can be swimmer itch or dermatitis or may be an insect bite reaction (contact dermatitis) (attachment removed to protect patient identity). Apply potent steroid for some time along with an oral antihistamine. You will get better. Nothing to worry about and yes it is not a fungal infection. Swimmer itch, insect bite reaction. Contact dermatitis to an insect. Apply Betamethasone propionate ointment BD over the lesion for one week. Take an oral antihistamine tablet. Maintain hygiene of the area. Wash with soap and water. Avoid using Dettol and other irritants. Do not use garlic, etc. </s>