HI, thanks for posting your query It seems the hot wax has caused a mild burn on the area mentioned as this area is more sensitive Take the following measures: apply a steroid cream like momatosone furoate twice a day.it will bring down the redness. In between calamine lotion can be used , it will give a soothing effect avoid sunexposusure till it heals continue with cold compresses. The red spot may heal in a day or two, but may lead to hypo or hyperpigmentation, which may take some time to go permanent hair reduction with laser can be considered later Hope this helps you