Good day, i dropped a weight on my thumb. thumb is swolen and the entire nail is blue. when pressing the tip with other finger, goes white and immediately red again. pain has gone down but finger is still slightly painful. nail is sensitive to pressr?

Thumb Trauma: Please see your doctor. If your accident has broken any bones they need to be in place for proper healing. The nail will likely grow back. Peace and good health.

Subungual hematoma: You have what sounds like a hematoma under the nail with pressure and pain the result. Recommend drainage of hematoma through the nail plate. This is usually associated with laceration of the nailbed and it may need to be repaired to avoid scaring that will prevent the nail from adhering to the bed resulting in deformity