Hi, to my understanding if new nail grown without the discoloration on it, then it's more due to trauma. I have a vertical line on my fingernail, had it for about a year now. Didn't think nothing of it and thought it would just go away by itself, it is still there and has got slightly darker. I have been to my GP today and been referred to a dermatologist on a quick 2 week referral. I am so so scared that it's subgunual melanoma. I haven't even told my husband or any of my family. I have had lots of health issues lately and do not want to add anything else to it for them. Obviously on the toe, you could have banged it and I know it can some times take months to heal. I hope you get into your GP and they can reassure you. Keep us updated. 

I'm sure you're right - I don't recall any kind of bang or trauma but like you say, it's easily done on your toes. Just found it odd that it hasn't moved for over 2 months. I will update on here once I've had the appointment though. 
Sorry to hear you're going through that stress and uncertainty. Good that you've got the quick referral though (although I'm sure it will feel like forever while you wait!). Let us know how you get on - will be keeping everything crossed for you. 

I'm sure you're right - I don't recall any kind of bang or trauma but like you say, it's easily done on your toes. Just found it odd that it hasn't moved for over 2 months. I will update on here once I've had the appointment though. 
Sorry to hear you're going through that stress and uncertainty. Good that you've got the quick referral though (although I'm sure it will feel like forever while you wait!). Let us know how you get on - will be keeping everything crossed for you.