Tattoos in Ancient Egypt
An interesting difference, however, persists in the interpretation of Egyptian women's tattoos as opposed to those of other cultures: the tattoos of Egyptian women were - and are - regarded, when they are not simply ignored, as a symbol of the lower class and the mark of a dancing girl or prostitute without considering other possibilities. Further, even when such options for interpretation are allowed, they must argue against this earlier understanding.
Possible theory.
A lot chose Bes as their tattoo but more often than not a line of dots across the abdomen would suffice. But then there are other factors to consider
Amunet a priestess of the goddess Hathor from the 11th Dynasty of the Middle Kingdom. The mummy of Amunet, discovered with the others in 1891 CE by Egyptologist Eugene Grebaut at Deir el-Bahri, shows patterns of tattooed lines on her arms, thighs, and lower abdomen. These tattoos are interpreted by some scholars as fertility symbols and this claim is strengthened by other statues and mummies of tattooed women with the same kinds of marks on their body.
Tattoos on Amunet's body.