I am aware that a woman and her sexual parts must remain pure for her husband only. I have heard that wearing a tampon during menstruation is a form of unlawful penetration, is this true? I thank you in advance.
It is permissible for females to use tampons during her menses. It will not
be regarded as unlawful penetration.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai