What causes rashes on the body during intercourse?

Hello,

Welcome to icliniq.com.

I understand your concern.

Based on the photo and your description, what you are experiencing appears to be a form of physical urticaria, most likely cholinergic urticaria or dermographism, both of which are types of hives triggered by physical stimuli like heat, friction, sweat, or emotional stress, common during sexual activity. The reddish, raised rash and itching you describe on your chest, side, and back that appear during sex and resolve afterward fit this pattern well.

Cholinergic urticaria is often triggered by increased body temperature from exercise, hot showers, or sexual activity, while dermographism can occur with skin rubbing or pressure. This is a benign condition, but it can be quite uncomfortable. Management typically involves taking a daily non-sedating antihistamine like Cetirizine or Fexofenadine, sometimes even before triggers if predictable.

If symptoms persist or worsen, we may consider a referral to an allergist for further evaluation, including trigger testing. It is also important to avoid known aggravating factors, such as hot environments, spicy food, or tight clothing, during physical activity. The rash in the image does not show signs of infection or a more serious underlying condition, but if you develop swelling, difficulty breathing, or the rash spreads rapidly, seek immediate care.

I hope this helps.

Kindly follow up if you have more concerns.

Thank you.