Things which are forbidden in Itikaaf
Going out of the mosque. Itikaaf becomes invalid if a person leaves the mosque for no reason, because the Messenger did not go out of the mosque except in the case of “human need,” i.e., to eat or to answer the call of nature. Food used to be brought to him in the mosque, because Saalim says: “As for his food and drink, it was brought to him where he was in his place of Itikaaf.”
He also used to go out to purify himself from minor impurities and to do wudoo, as Aaishah (may Allaah be pleased with her) said: “The Messenger of Allah (peace and blessings of Allah be upon him) used to put his head into my room whilst he was in the mosque, and I would comb his hair. He would not enter the house except in the case of need when he was in Itikaaf.” (Fath al-Baari, 4/808).
Touching women with desire – including intercourse. This is something which invalidates Itikaaf, because it is clearly stated that this is not permitted, in the aayah (interpretation of the meaning): “And do not have sexual relations with them (your wives) while you are in Itikaaf (i.e. confining oneself in a mosque for prayers and invocations, leaving the worldly activities) in the mosques” [al-Baqarah 2:187].
Menstruation and post-natal bleeding. If a woman who is in Itikaaf starts to menstruate or experiences post-natal bleeding, she has to leave the mosque to preserve the purity of the mosque. The same applies to anyone who is in a state of junub (impurity following sexual discharge) – until he does ghusl.






