"Needless pain" refers to suffering or discomfort that serves no purpose or has no justification. It implies that the pain or distress is unnecessary and could have been avoided. Full definition
So many animals around the world continue to suffer needless pain, endure ill health and die prematurely. (spana.org)
This can help to minimize the often needless pain and offense taken by the other side, yet obtain the same ultimate relief for you: a divorce. (kaplandivorce.com)
Preventative Health Care on a regular basis will save you and your pet from needless pain as well as help protect you from a larger financial burden. (westchestervetmedcenter.com)