I have noticed vertical lines forming on some of my nails. some are more prominent than others. is this something to be concerned about?

Usually harmless: Vertical nail ridges are usually harmless and most commonly age-related. But you are young, so you need to be evaluated. The most common causes are anemia (most likely in ur case), peripheral vascular disease (usually in older patients) and rheumatoid arthritis (you'd probably know if u had that. Chk this: https://www.medicalnewstoday.com/articles/319867

Nail ridges: Vertical nail ridges can result from differing cell turnover in the nail which can occur with aging. It is a common occurrence. Vertical ridges with nails that are brittle or splitting may be related to lichen planus, anemia or hypothyroidism. Changes in color or horizontal ridges may be related to possible medical problems.