Question: I suffer from a stomach disease which causes me to regurgitate my food while still a liquid. This occurred during Ramadaan. Should I make up for these days?
Answer: If the fasting person regurgitates something from the stomach into the mouth, they should spit it, but if they swallowed it intentionally, the Sawm (Fast) is invalid. However, if one swallows it unintentionally, the Sawm is valid... read more here.