What Could Cause Pain under My Thumb Nail, and How Should It Be Addressed?

When you experience pain under your thumbnail, one common reason is a small injury you might not have even noticed. This can cause a subungual hematoma, where blood collects under the nail creating pressure build up, leading to sharp pain. Applying a cold compress can help relieve the pain and reduce swelling. If the pain is mild and improves over time, home care like resting the finger and avoiding further trauma is usually enough. However, if the pain remains intense or worsens, a doctor might need to drain the blood buildup to relieve the pressure. In rarer cases, pain under the nail could be caused by a glomus tumor—a small benign growth that forms from blood vessel tissue. Glomus tumors often cause severe pain that is difficult to manage with simple remedies. In such cases, it’s important to see a healthcare provider for proper diagnosis and treatment, which may involve further tests or a minor surgical procedure. Monitoring your pain and any changes in the nail is key to deciding when to seek professional help.