Lamashtu is unusually well documented for a Mesopotamian demon because an entire body of incantation tablets, generally referred to by modern scholars as the Lamashtu Series, exists specifically to identify her, describe her origins as a troublesome daughter of the sky god Anu rejected even by the other gods, and provide detailed ritual procedures for expelling her from a household, often centred on protective amulets showing her standing on a donkey and nursing an animal in place of a human infant. This makes her one of the better attested named demons of the ancient Near East rather than a vaguely described threat. Her particular focus, harming pregnant women, infants, and mothers in childbirth, has led many scholars to compare her to Lilitu, a similarly dangerous female night demon in Mesopotamian tradition, and further to ask whether either or both fed into the much later Jewish Lilith figure, who by the medieval period had become a fully developed named character with her own mythology.
The comparison is taken seriously by historians of religion, but a direct, documented line of borrowing from Lamashtu or Lilitu specifically into the later Jewish Lilith has not been established with certainty, and scholars generally describe the relationship as one of shared ancient Near Eastern demonic motifs rather than proven direct descent from one named figure to another.