an issue or difficulty that needs to be resolved

a child who is difficult to manage or control

कठिन बच्चे

English Usage: Her son is known as a problem child because he refuses to follow rules.

Hindi Usage: उसका बेटा एक कठिन बच्चे के रूप में जाना जाता है क्योंकि वह नियमों का पालन करने से इनकार करता है।