Gluten is a protein found primarily in wheat, barley and rye. If a person has a gluten intolerance, this protein can cause digestive problems such as gassiness, abdominal pain or diarrhea. Gluten intolerance is sometimes confused with Celiac disease, or thought of as a food allergy.

In adults
Symptoms of a gluten allergy are often similar to those in celiac disease and may include:
abdominal pain
diarrhea
constipation
fatigue
bloating
heartburn
anxiety
anemia
Additional symptoms of a gluten allergy may include:

trouble breathing
ulcers in the mouth
asthma
depression
osteoporosis
weight loss
rash
swelling of the lips
irritability
anaphylaxis (in extreme cases)
In children
A gluten allergy may look very different in children than in adults, so it’s important for parents to monitor their child's behavior and diet if they suspect a gluten allergy. Know, also, that this allergy may go into remission only to return in later years.

Home remedies and treatments for Celiac Disease or Coeliac Disease include a number of dietary, lifestyle, and behavioral treatments that can help reduce the severe symptoms of this condition. These remedies include fish oil, dietary restrictions, nutritional supplements, yogurt, goldenseal, chamomile, horsetail tea, a gluten-free diet, and papain supplements.

https://www.google.co.in/search?q=What+does+a+gluten+allergy+mean%3F&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjS0urgx-XXAhUESI8KHecvCwMQ_AUICigB&biw=1366&bih=613
https://www.healthline.com/health/allergies/gluten-allergies#diagnosis
https://www.organicfacts.net/coeliac-disease-gluten-intolerance.html