The phrase "common problem" refers to an issue or difficulty that many people experience or encounter regularly. It suggests that the problem is not unique and is faced by a large number of individuals. Full definition
The most common problem in dogs and cats is periodontal disease. (tulsapetsmagazine.com)
One of the most common problems with cats is urine marking around the house and sometimes, right outside of the litter box. (halifaxveterinaryhospitalinc.com)
A: Going back to old eating habits seems to be a very common problem with many diets. (3daymilitarydiet.net)