I wear thongs a lot and about 5 days ago i noticed some irritation. These turned into ulcer/sore like things and i am in constant pain.
Its really difficult to tell from this picture what the problem is. Ulcers, sores or blisters are typically associated with genital herpes. However, thats would be just a guess from this photo and you should get seen by a gynecologist or womans health nurse practitioner to be sure. Dr. Vera