sore point, a

sore point

A topic that makes one angry or uncomfortable. Whatever you do, don't mention his ex-wife—his divorce is really a sore point with him.
See also: point, sore
Farlex Dictionary of Idioms.

sore point, a

A sensitive or annoying issue, as in Don't mention diets to Elsie; it's a sore point with her. This idiom was first recorded as a sore place in 1690.
See also: sore
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • a sore point
  • sore point
  • you've got a point there
  • come to the point
  • come to the point and get to the point
  • come/get to the point
  • get to the point
  • get to the point, to
  • all over but the shouting
  • it's all over but the shouting