Why have I ridges on my nails and is there a good product that helps cover them?

ridges can be a symptom of other condition. for example, pitted nails occur when you have a form of psoriasis. Also, is it all your nails? if not, maybe that one was damaged in some way, slammed in a door as a child etc. Consult a doctor if it is all of them ridged. A good place to look up symptoms is Mayo clinic.com Can help you sort out if it is serious or cosmetic problem. A good manicurest can help with covering the problem.