Hello doc started to get brown lines on finger nails no sickness just my father had linden factor 5(blood) and I was just having multivitamins A to Z  for almost 1 month around 15 tabs or so  without any prescriptions have stopped having it from past 1.5 weeks is this something serious or just some reaction for the multivitamins I was having have searched about this and got so many answers / reasons would kindly appreciate if I get some kind of advice have not visited any doctor also .. Thank you