A red, bumpy spot on the penis that isn’t itching or burning could be caused by various factors, including a fungal infection (like a yeast infection) or another condition. Wearing sweaty, mildew-smel...

It's great that the spot isn't causing you any itching or burning discomfort. Given your description of wearing sweaty underwear for two days, it could definitely be a fungal issue like jock itch rather than herpes. Fungal infections are more common in moist and warm areas like the groin due to sweat buildup, so that would make sense based on your situation.

Herpes typically presents with clusters of painful blisters and ulcers along with other symptoms such as tingling or itching sensations before the outbreak. Since your spot doesn't seem to match those typical signs of herpes, it may lean more towards being fungal given the circumstances.

To confirm what exactly is going on down there, I'd recommend seeing a healthcare provider who can visually inspect the area or perform tests if needed for an accurate diagnosis.