Question: A- Is it permissible for doctors under normal circumstances to break their Sawm (Fast) if they feel exhausted by work? What is the ruling if they conduct surgical operations, some of which take a long time? Does the ruling differ if it is an emergency case?
B- Is it permissible for patients to break their Sawm because of toothache?
Answer: It is not permissible for doctors to break their Sawm to treat patients, unless the case of the patient is so serious that it requires the treating doctor to break Sawm. In this case, it is permissible for the doctor to break their Sawm; for it is done to save a person’s life... read more here.