If you can sew a sleeve into an armhole, you can make a bra….Linda Sepeda

It shouldn't hurt to wear a bra.
Nor should wearing a bra cause "divots" in the shoulder area or the rib cage.

Many women wear the wrong size bra, and doing that can hurt for a number of reasons.
It can also affect circulation and cause numbness. The shoulders and back can hurt. Wires could constrict or poke.

A properly sized bra can alleviate many of these conditions, and might even make you look younger and slimmer.