I've had a brown vertical line on my middle finger nail for the past year. It hasnt grown or hurt, but I read somewhere that this could be a sign of melanoma. I dont have a family history of cancer. Should I be concerned?

The brown vertical line in your nail plate may be due to a condition called longitudinal melanonychia. While it can sometimes be a sign of melanoma, it is important to consider other causes first. In your case, since there is no associated growth or pain, it may not be a cause for concern. However, it is still recommended to have it evaluated by a healthcare professional to rule out any serious conditions.