WHEN BREAKING OF FAST IS PERMISSIBLE  

  1. If anyone fell so ill suddenly that the fast may endanger his life or will aggravate the illness, then it is permissible for him to break the fast on this excuse. Or such as there was severe pain in the stomach or was bitten by a snake, then it is permissible to take medicine and break the fast. In the same way if the thirst became so severe that life is endangered, then breaking of fast is permissible.
  2. If any such thing happens to a pregnant woman that her life or that of the child is in danger, then she may break the fast.
  3. If on account of cooking food thirst became so severe and unbearable that one's life was in danger, then it is permissible for such a person to break the fast. But if the person was himself responsible  to bring about. such condition by working excessive deliberately, then it would be a sin.

CONDITIONS FOR NOT KEEPING FAST