Big red rash on inner thigh

For about six weeks I've had a rash on my inner thigh spreading from the crease of my groin (see pic)

http://img172.imageshack.us/img172/1848/redwd6.jpg

It feels quite normal and doesn't itch.

I am overweight and do sweat quite a bit in that area so I am trying as much as I can to wear loose clothes and give it as much air as possible but its not going away.

An ideas?

[Alan Rockoff, MD]

It looks like tinea cruris ("jock itch"-- a fungus infection.)  I suggest you pick up some over-the-counter 1% clotrimazole cream and apply it twice a day.  If that doesn't clear you up in 2 weeks, show the rash to your doctor.

Best.

Dr. Rockoff