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Published on: 4/7/2025

What Could Brown Discoloration in My Nails Indicate about My Health?

Brown nails can be caused by certain medications, habits, or changes in the pigment of your nail. It is important to check with a doctor to understand exactly why this change happened.

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Explanation

Brown discoloration in your nails might have a few different causes. One possibility is the use of medications such as minocycline, which sometimes leaves a brown stain on the nails. Some habits or repeated pressure on your nails may also lead to brownish changes, which is called habit-induced chromonychia. Additionally, melanonychia is a condition where extra pigment builds up in the nail, sometimes leaving a brown band or an overall brown tint; this can be harmless or sometimes require more investigation. Although these conditions typically are not serious on their own, changes in your nails can sometimes be a sign of an underlying issue. It is best to have a healthcare professional look at your nails if you notice discoloration so that they can determine the cause. They might ask you questions and do simple tests to decide on the best way to treat your nails and keep your overall health in check.

(References)

  • Tavares J, Leung WW. Discoloration of nail beds and skin from minocycline. CMAJ. 2011 Feb 8;183(2):224. doi: 10.1503/cmaj.091498. Epub 2010 Nov 22. PMID: 21098068; PMCID: PMC3033929.

  • Kim JA, Kim M, Cho BK, Park HJ. Multiple habit-induced nail problems including diffuse brownish chromonychia. Ann Dermatol. 2014 Dec;26(6):793-5. doi: 10.5021/ad.2014.26.6.793. Epub 2014 Nov 26. PMID: 25473250; PMCID: PMC4252695.

  • Singal A, Bisherwal K. Melanonychia: Etiology, Diagnosis, and Treatment. Indian Dermatol Online J. 2020 Jan 13;11(1):1-11. doi: 10.4103/idoj.IDOJ_167_19. PMID: 32055501; PMCID: PMC7001389.

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