What can cause brown discoloration of my nails?

Brown discoloration of the nails, also known as melanonychia, can occur for several reasons. It may be harmless, like a mole under the nail, or more serious, such as a sign of melanoma, a type of skin cancer. Sometimes, melanonychia appears as a brown or black stripe along the nail, which is called longitudinal melanonychia.

Possible Causes:

1. Benign Causes:

• Pigmented moles or freckles
• Trauma or injury to the nail
• Fungal infections

2. Serious Causes:

• Melanoma, a type of skin cancer

Melanonychia can be a clue to a correct diagnosis, so it is essential to pay attention to any changes in your nails. If you notice new or changing brown discoloration, it is important to consult a healthcare provider. They can determine whether the condition is benign or if further investigation is needed.

Understanding the appearance and changes in your nails can help in recognizing whether the condition is benign or requires medical attention. Always seek professional advice if you are unsure about changes in your nails.