Ihram is, in Islam, a sacred state which a Muslim must enter in order to perform the major pilgrimage or the minor pilgrimage. A pilgrim must enter into this state before crossing the pilgrimage boundary, known as Mīqāt, by performing the cleansing rituals and wearing the prescribed attire.
Restrictions
A man in the state of ihram must not tie any knots or wear any stitched items. Sandals and flip flops must not be stitched either and should allow the ankle and back of foot to be exposed. Whilst in the state of ihram, a Muslim must not use any scents on the body or on the robes. If the robe has been fouled by najas material or has been wiped, rubbed or touched by scented liquids, then a new iḥrām clothing must be worn, or the Umrah or Hajj will be invalid. During ihram, women must have their faces uncovered; they are forbidden to wear the Burqa or Niqab. However, the Hijab or Dupatta is obligatory. There is also no gender segregation during the Hajj. Unlike in mosques, men and womenpray together, not just in the same area but also on the same prayer line. This is to remind everyone that on the Day of Judgment, both men and women will be standing together, side by side, in the same rows.
Behaviour and cleanliness
Aside from being as clean as they are for prayer, male Muslims are expected to refrain from cutting their nails, and trimming their hair and beards. They must also not wear any scent, including deodorant. They have to wear ihram clothing, which is a white, seamless garment. Many also shave their head as this is considered hygienic. Most will wait to shave their heads until after they have finished Umrah or Hajj, as this is a requirement to leave the state of ihram. Female Muslims are also expected to be clean. During the pilgrimage, sexual activity, smoking and swearing are also forbidden. Other forbidden activities include killing animals, using profane language, quarrelling or fighting, and taking oaths, in addition to any other regularly prohibited acts. Males should also refrain from looking at women. Women must exercise strict modesty in their appearance and should not apply make-up, perfume or any other cosmetics. Also, Muslims are not allowed to use scented soap. Unscented soap is available for pilgrims during hajj. All flirtatious, arrogant and rude thoughts are to be put aside, as well as day-to-day life. Muslims must forget about studies, business and relationships, and focus on God.
When flying
When flying on pilgrimage, appropriate measures are usually taken to assure that the pilgrim will be in the state of ihram when flying above or alongside the stations of miqat. For this reason some airports in Muslim areas have dedicatedihram rooms where pilgrims can change into the necessary clothing. If flying with an airline originating from a Muslim country, airline staff announce to be in the state of 'ihram' before entering in the boundaries of "Miqat".