For many patients, allergies don't allow them to breathe well. Other present with rashes on skin and there are others that have food allergies and food intolerances. For all these patients we have allergy testing through blood only ( through a reputable outside lab, no skin testing! ) and specific treatment with supplements and diet to resolve or greatly diminish the allergy itself. Most insurances, including MEDICARE pay for this service ( DOCS and OHP might not pay for this service ).