Gluten sensitivity is a skin condition called dermatitis herpetiformis (DH). DH shows up as bumps or blisters that are very itchy and form clusters on the skin. These clusters are often near the elbows, knees, buttocks, and hairline. Like many other skin conditions, these skin conditions may be mistaken for eczema but is actually a reaction to ingesting gluten. DH is more common in men which usually appears for the first time between the ages of 30 and 40 plus it is more common in people of northern European descent.
Note that the majority of people suffering with DH are diagnosed with celiac disease. However, 20% of DH sufferers will have normal intestinal biopsies according the Celiac Disease Foundation. The gastrointestinal symptoms of gluten-free sensitivity usually do not co-occur with DH. Staying on the gluten-free diet greatly improves DH skin symptoms. If you have skin conditions described, a dermatologist can diagnose you with a quick skin biopsy. Topical treatments may be prescribed for short-term itch relief. The best way to control DH is by maintaining a strict gluten-free diet.