- He or she is not travelling.
- He or she is not suffering from any illness on account of which the fast may be injurious to his or her health.
If a person starts on a journey after the time of Zohar prayer, he should continue to fast for the rest of the day. If a person arrives home or at a place where he intends to stop for ten days or longer before mid-day, then, provided he has not had anything to eat or drink or done anything which breaks the fast from the time or "Sahar," he may make the Niyyat (intention of fasting) and keep fast on that day.
If a woman is feeding (suckling) an infant, and it is reasonably apprehended that the infant would be deprived of its due nourishment, then she must not fast.
Abstention: During the period of the fast the devotee is required to abstain from:
Smoking
Immersing the head in water.
Taking an injection.
If a person deliberately does any of the acts by which a fast is broken, then not only must the person osberve the "qaza" (i.e. make up for the broken fast) but also fast for sixty days as kaffara (penalty), or feed sixty poor persons.
In case of doubt and difficulties arising out of the broad principles of fasting, it is advisable to take the advice of the Mujtahid under whose guidance the person is.
source : rafed.net
