For sisters
What if my period starts after I finish tawaf?
If your period begins after you have finished tawaf, you may still complete Sa'i, since purity is not required for it. Then cut your hair as usual.

Completing Sa'i
Purity is not required for Sa'i, so go on to Safa and complete your seven laps, then shorten your hair to leave ihram.
If it starts during tawaf
Tawaf requires purity, so ask a scholar about your exact situation. See Umrah during a period.
Related
See wudu for Sa'i and hair cutting for women.
More questions
Do I need to wait for purity to cut my hair?
Ask a scholar about your case; the guidance here covers the usual situation after tawaf is finished.
Can I stay in the masjid?
Ask a scholar. In general a woman in her period does not enter the masjid.
Should I speak to a scholar before flying?
Yes, if your flight is due before you expect to be pure.
Read the full guide
Perform your Umrah with confidence
Follow every rite in order, with counters and duas in Arabic, in our step by step Umrah guide. To study the Hanafi rulings behind it with qualified teachers, see our courses, or explore our apps. Ihya us Sunnah is sustained by its community, so please consider supporting our work.
This guide follows the Hanafi method and is based on Shaykh Mufti Wajid Iqbal's Umrah book, Essential Islam. For your own situation, ask a qualified scholar.