Yes, Kegel exercises work. Strengthening the pelvic floor has benefits for both women and men, although it is common to think that they can only be done by women.
However, if no results are seen after a few weeks of Kegel exercises, it may be that they are not being done correctly. It is therefore advisable to consult a physiotherapist who specialises in pelvic floor exercises. He or she will be able to assess whether Kegel exercises are being done properly and will be able to adapt the training to your particular case.