Question 150: Is it permissible for me to apply henna to my hands and hair during the time of my menstrual period?
Answer: All praise be to Allaah Alone, and peace and blessings be upon His Messenger, and his family and Companions. It is permissible for you, for the basic principle in this regard is permissibility since there is no Shar‘ee (Islaamic legal) text to the effect of prohibition… read more here.
Question 149: My wife has not had her monthly period for over five months, and she is not pregnant according to tests and medical examinations. The doctor has prescribed pills for her so that she can have her period. Can she take these pills?
Answer: All praise be to Allaah Alone, and peace and blessings be upon His Messenger, and his family and Companions. It is permissible for her to take the pills as long as the doctor affirms that they do not have effects that are more harmful than or equal to the benefit of taking them… read more here.