Some patients who visit the clinic will experience a pain that is sharp when a point on the nail is touched, and painful when cold water is encountered. What is this problem? This is actually a manifestation of a specific disease – hemangioblastoma. This type of tumor is found under the nail and pain is the main symptom. Its treatment so far is surgery. First of all this kind of surgery requires a specialized hand surgeon to perform. This type of surgery varies from doctor to doctor. I usually do not remove the nail, but only take a small cut in the nail to remove the tumor and recover quickly.