(to) run into a problem
(To) cause a problem
a potential problem
a headache
(to) overcome a problem
a shared problem is a problem halved
a draw back
a problem child
(to) deal with a problem
a disadvantage or a negative part of a situation
(to) find an answer to a problem
a problem that might happen in the future.
(to) begin to experience a problem
(to) make a problem happen
something that gives you a problem or a worry
a child who causes probems
if you tell someone about the problem, it is easier to deal with
(to) take action/(to) try to solve a problem