I think its heat rash. I get it also, hurts to walk. I use hydrocortisone cream. Ask the pharmacist where it is and confirm. Clears it up good. I keep a tube at all times.
Hi Cool, Yes it will help shaving the hairs off, then just add some vasoline to give that bit extra comfort, you will find a lot of athletes do the same, makes them fill more comfortable, but shave all the way through if you know what I mean.
Good Luck