<s>[INST] Hello. I have small bumps on the foreskin of my penis that sting. Also got a patch of small red bumps at the start of my butt crack, those don t sting just feel a small irritation. No headaches, body aches or flu like symptoms just stinging on the foreskin of my penis. I am not circumsized and have been working in the heat. I wear tight jockey briefs. I started chaffing between my legs between my anus and testicles to be specific. But this has happened before when I m out in the heat and get to sweating. But these stinging bumps on my goteskin have never happened. [/INST] Thanks for asking in healthcaremagic forum Fungal infection is very common in those areas, especially when there is moisture always. So, please wear loose clothes and keep the area clean and dry. Reddish rashes may be fungal in origin. Please visit dermatologist for examination and further management. </s>