This is the 15740th most frequent Russian word.
причиняет
"Causes" or "inflicts."
The word "причиняет" is used here to mean "causes" or "gives rise to" in a negative sense, referring to "causing pain."
Он причиняет боль своим словами.
He causes pain with his words.
Here, "причиняет" conveys causing or creating an undesirable situation, in this case, inconvenience.
Неправильное поведение причиняет неудобства другим.
Improper behavior causes inconvenience to others.
In this context, "причиняет" means "leads to" or "results in" a state, which is expressed as fatigue in this example.