Finding a black streak on your fingernail can be alarming, but before you jump to the worst conclusion, let's explore the common causes. These streaks, also known as splinter hemorrhages or melanonychia, can stem from various factors.
One frequent culprit is trauma. Even minor injuries like hitting your nail against something can cause tiny blood vessels underneath the nail to rupture, creating a dark line. These usually grow out with the nail.
Sometimes, fungal infections can cause nail discoloration, including dark streaks. Certain medications can also lead to changes in nail pigmentation.
Less commonly, black streaks can be a sign of melanoma, a type of skin cancer. This is why it's crucial to monitor the streak. If it's widening, darkening, changing shape, or if you notice it suddenly appears on multiple nails, consult a dermatologist immediately. Early detection is key for successful treatment.
In most cases, black fingernail streaks are harmless. However, paying attention to changes and seeking professional advice when concerned is always the best course of action. So, observe, don't panic, and get it checked if necessary!
