The Prophet (peace be upon him) said: 'Whoever introduces something into this matter of ours that is not of it, it is rejected.' During Hajj and Umrah, many practices have crept in over the centuries that have no basis in the Sunnah. Scholars have warned against these innovations, as they can detract from the true worship and may lead to beliefs that contradict the correct creed.
Sheikh Ibn Baz listed several common innovations to avoid: Making dua in a group, where one person recites and others repeat in unison during Tawaf — the Sunnah is individual dua in one's own words. Specifying particular duas for each circuit of Tawaf — there is no authentic dua designated for specific circuits except the dua between the Yemeni Corner and the Black Stone. Touching all four corners or walls of the Ka'bah — only the Black Stone and the Yemeni Corner are touched. Wiping the Ka'bah's cloth (Kiswah) and rubbing it on one's body for blessings — this has no basis in the Sunnah. Visiting sites in Makkah like 'the cave where the Prophet was born' as holy places — the Prophet never designated these sites for visitation.
Sheikh Al-Albani added further innovations to avoid: Kissing the Yemeni Corner (it is only touched, not kissed). Raising the voice excessively during Tawaf, disturbing others. Reading specific surahs of the Quran at the Multazam. Believing that water from the Zamzam well at the Ka'bah area is more blessed than Zamzam from other sources. Making several consecutive Umrahs from Tan'eem as a formal ritual. The principle is simple: follow the Prophet's example as authentically documented, and do not add to it.