What kind of underwear should I wear months after inner thigh lift?

Hi there, as you know, irritation can be common after thigh lift due to the warm/moist nature of the groin. My first suggestion would be to assure that you don't have any rash or yeast infections going on near the incision lines or in the groin.  You can take some Benadryl or over the counter allergy medicine to help with the post op. itching. I would encourage contacting your surgeon to assure proper healing and for now, wear loose, comfortable, breathable (cotton) undergarments.