Dermatology Questions? Ask an Online Dermatologist.
Thank you for your question. My name is***** and I will do my best to provide a useful input.
Took a look at the pictures - your fingernails are normal. The line you are talking about towards the free edge of the nail is normal and corresponds to something known as the onychodermal band. This can become more visible in the winters or cold exposure or on its own. There is no correlation with drinking. Don't worry about it.
Please feel free to ask if you have any queries. I will be happy to continue further and do everything I can to provide you with the service you seek.