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Kindly consult a dermatologist

Looking at your photo, this is a pale/whitish longitudinal nail ridge — not a dark stripe. Melanoma (subungual) presents as a dark brown or black band, often with pigment spreading to the skin around the nail (Hutchinson's sign). What you have looks like benign longitudinal ridging (onychorrhexis), which is very common, especially with age or minor repetitive trauma to the nail matrix. Not something to worry about based on the photo.

Hi! 😊 That vertical dark line on your nail is most likely melanonychia very common and harmless. Book a quick consultation with me now for a proper look and full peace of mind.

Normal.

It looks like normal  no color change,  not exactly what you say

Can help you, kindly consult and provide detailed history for proper diagnosis and further management

Normal

Kindly do connect and consult with me for better treatment plan and advice on your case

Though there are several pathological conditions which can have a single dark black line on nail.. But as per your image it's more of giving a sign of any local trauma bcz it's reddish brown in colour... If it is recently produced by any unknowing trauma, then don't worry it will be healed by it's own bcz nail bed has good blood supply

Need a few more details please consult for further evaluation and treatment

Avoid fried and spicy food Water intake more Green leafy vegetables more Fiber meal Do connect and consult Will help you

Looks ok