Toenail color changes -- from a big blue spot to a thin brown line -- could signal health problems. Here’s what you need to know. If your toenail turns black, it’s most likely a bruise under the...

The discoloration may appear brown, yellow-black, or gray, often accompanied by nail thickening or crumbling. 3. Underlying Skin Conditions. Certain skin disorders, such as psoriasis or lichen planus, can affect the nail’s color and structure, occasionally leading to darkening or discoloration. 4. Melanoma (Rare but Serious)

Jul 16, 2019 · Toenails can turn black from nutritional deficiencies, infection, or trauma. This may go away on its own. If not, see your doctor to rule out a more serious cause. Read on to learn about the...

Aug 6, 2024 · Black toenails can be caused by an injury, infections, diabetes, cancer, and more. Learn how get rid of a black toenail and when to see a healthcare provider.

Jul 23, 2023 · Melanonychia is a brown or black color in your nail. It can affect your fingernails or toenails. It can be in one nail, a few nails, or all of your nails. Melanonychia can have many different...

Jun 19, 2024 · Black toenails can result from an injury, a fungal infection, or pigmentation changes over time. More serious causes include heart disease or melanoma. Treatment for black toenails will vary...

Feb 27, 2025 · Melanonychia is brown, gray, or black discoloration of the nail plate that can be caused by many conditions, ranging from benign to malignant. 1 Careful evaluation is needed to rule out melanoma and other malignant causes of nail discoloration. Treatment varies based on the underlying cause. 1 This article describes the etiology, symptoms, and treatment of melanonychia and how to distinguish ...

Apr 23, 2023 · A podiatrist explains the common causes of a black toenail (aka a subungual hematoma) and provides tips on how you can restore your toenails to tip-top shape.

Apr 21, 2017 · The most common culprit for black nails, repetitive trauma can result from running, or from wearing any type of ill-fitting footwear. If a black nail crops up shortly after a workout or a day spent in too-tight or too-loose shoes, this is likely the cause.

May 9, 2023 · What causes a black toenail? If you have suffered a black toenail then it is likely you have either stubbed your toe, dropped something on it, or run a very long way. Trauma causes soft tissue injury resulting in bleeding under the nail. As a result, the nail appears black.