there can be urinary tract infection or allergies to medicines for other disease or foods allergies also causes gerd in which hyperacidity causes acid t come in mouth causing problems of taste need to add antibiotics to conter infection take norfloxacin 400 mg bd for 5 days to clear stomach and uti infections add anti allergic ebastine 10 mg bd add liquid antacids tds to counter abdomen pain and taste problems apply calamine lotion on face and effective parts of face take meftal spas for pain continue till 3 week