To solve the mystery:
SKIN PROBLEMS RELATED TO OBESITY
Acanthosis Nigricans
Acanthosis nigricans is a skin disorder that causes brown or black markings to appear on the skin. These marks usually appear in the groin, armpits or neck area. According to the American Osteopathic College of Dermatology, this condition is most often related to obesity. This condition is related to elevated insulin levels, which often occurs in obese patients.
Skin Tags
Skin tags are growths that stick out and may be connected to the skin with a narrow stock. They are benign and usually do not cause any pain. According to the National Institutes of Health, skin tags are more common in overweight people because the extra weight causes friction between the affected areas of skin.