Hiding Mental Illness For Marriage
If it is a clinical illness then one should not hide it from prospective husband and his family, as deceit goes against universal moral values and should be avoided. Even if someone hides it before marriage, the chances are high that it will be revealed to the husband eventually and at that time, the loss and damage would be much greater. Regarding OCD and other intrusive thoughts regarding Islam, you will find the following video very helpful Insha’Allah: https://youtu.be/kgP7-WSJ44A