What Can Cause Random Pain under My Fingernail Without Any Injury?

There are several reasons why you might experience pain under your fingernail even when you don’t remember hurting it. One possibility is a mild form of paronychia, an infection that affects the skin near the nail. Sometimes, bacteria or fungi can get into tiny openings around the nail, causing pain, tenderness and redness without a clear history of injury. In older people, nail changes happen naturally over time, and these changes can lead to discomfort. The nail may become thicker, brittle, and even change in shape, making it more prone to sensitivity even with everyday pressure or slight stress. Other nail conditions can also cause pain by affecting the nail bed. It is important to watch for other signs, such as swelling, color changes, or alterations in the nail’s surface, which could help pinpoint the exact problem. If the pain is persistent or worsens, it is a good idea to have a doctor take a closer look to decide on the best way to help you feel more comfortable.