Pilgrims are forbidden from doing many things that are normally permitted.
Aside from the ritual cutting of hair and any grooming that is done during the ritual preparation before entering Mecca, pilgrims may not shave or cut their nails and men may not wear sewn clothes. Women may not cover their faces, even if they would do that in their home country. No colognes or perfumes can be worn.
Men and women are also forbidden from having sexual relations and fighting or arguing.