Hi welcome to the health care magic Infection in body can lead headache as associated complaints.... Here you should investigate with stool routine examination for look for any parasites egg if present If entameba or giardia like egg present than metronidazole prescribed... If other hookworm or round worm egg present than albendazole needed If stool doesn t show parasite than suitable ofloxacin like antibiotic prescribed along with tablet pantoprazole... Avoid gastric irritants like... -Excess tea, coffee -Smoking -non veg foods etc Drink hot water for drinking If constipation is troublesome than drink more water, avoid sedentary life style and include whole grains and wheat bran like fiber in diet.. If needed psyllium with milk can be taken Take care Consult physician for examination