Hello dear, Thank you for your contact to health care magic. I read and understand your concern. I am Dr Arun Tank answering your concern. As you are taking the antibiotics treatment for the pilonidal sinus, it can cause gastritits. So as if you are not taking the treatment for the gastritis than you should take it. Pantoprazole with domperidone combination can help you to recover from acidity. Please avoid eating spicy foods. You can take small frequent meal but not single heavy meal. You can also take cold milk on every evening. This will neutralise the acid of the stomach. Pilonidal sinus can always requires surgical correction as final treatment. So once your infection is cured you can take the surgery done. Hygiene maintenance by frequent cleaning and dressing is equally important as taking antibiotics please maintain it. I will be happy to answer your further concern on bit.ly/DrArun. Thank you, Dr Arun Tank Infectious diseases specialist, HCM