Hazrat Mahdi (as) will HAVE A DIP at the beginning of his straight nose, BETWEEN HIS EYEBROWS. AS WITH THE PROPHET MUSA (AS), THE MOLE ON HAZRAT MAHDI’S (AS) CHEEK WILL PROTRUDE SLIGHTLY AND BE BRIGHT LIKE A STAR. HIS COMPLEXION IS VERY BRIGHT.
Bihar al-Anwar, Vol. 13, p. 243 (Farsi translation)
The hadith notes that the Prophet Musa (as) had a similar mole on his cheek to the light-colored one on the cheek of Hazrat Mahdi (as). Hazrat Mahdi (as) descended from our Prophet (saas) and comes from the same line as all the prophets. Allah has used this blood bond to create similarities between the other prophets and Hazrat Mahdi (as). The hadith also refers to the brightness of Hazrat Mahdi’s (as) complexion. Brightness of complexion will be so rare in the End Times as to constitute a distinguishing feature.