Yes.
However it is good to avoid being paranoid about jinns or black magic. Most jinns have better things to do than get involved in people's lives, and some people blame everything on jinns or black magic because it is easier or less painful than looking at some of the tangible and obvious reasons for why they are having problems.
Of course, if someone genuinely feels they are having a problem in this area, it should be dealt with the same as one would deal with any other life problem.