I suffer too... I am underweight for my height, the docs say I should be around 145-155 lbs. somewhere around there. The thing is, my thighs are my trouble spot. Being 128 pounds and having your thighs still rub together slightly is very annoying. x_x I exercise occasionally but mainly don't because it causes the muscle to build in the inner thigh and make it worse. My body tends to want to build muscle when I want to have a thin (runner, biker) only type body. Not easy.