My serum test is negative for endomysial antibody iga, ttg tissue transglutasminase iga, gliadin antibody igg. But positive for gliadin antibody iga?

Treat the person. Lab tests mean nothing in isolation, and have many false positives and false negatives. The decision to make a trial of a gluten-free diet will be between you and your gastroenterologist or dermatologist based on the big picture.