Hello I appreciate your concern This could be platynychia, fungal infection of nail or an ingrowing toe nail If you can upload me a photograph I will be able to guide you better I would like further information like since how long you have this problem is there any swelling or discharge from the nail You may require a course of antifungal drug or powder under supervision of your doctor Maintain good hygiene wash it with antiseptic solutions or soap regularly Thanks for your question follow up questions are most welcome Regards