I have a light greyish vertical line on my great toenail. I have booked a GP telephonic appointment for tomorrow. I am not sure if the GP would refer me to a dermatologist. I am sure the line was not there 2 weeks back. I would like to ask if anyone knows in the worst case and if it's starting would it be cured? I am only 31 and a mother of an infant and can't stop worrying about this. Would I be able to live longer if it's treated earlier? Also what if the GP doesn't refer me?