Albert Barnes Commentary Jeremiah 16:6

"Both great and small shall die in this land; they shall not be buried, neither shall men lament for them, nor cut themselves, nor make themselves bald for them;" — Jeremiah 16:6 (ASV)

Cut themselves ... make themselves bald - Both these practices were strictly forbidden in the Law (marginal references) probably as being pagan customs, but they seem to have remained in common use. By “making bald” is meant shaving a bare patch on the front of the head.