Hi & Welcome. Venous access or venipuncture (to draw the blood) can cause injury to the underlying nerves in the cubital fossa (front portion of the elbow). Based on the history given, you seem to be suffering from nerve injury during the process of venipuncture. I advise you to consult a doctor or neurologist for further evaluation. You may need certain tests such as nerve conduction study or EMG for an accurate diagnosis following which your doctor will prescribe either Gabapentine or Pregabalin along with Mecobalmine injection. These don t cure the nerve damage, but they often help with the pain. Hope the advice given would be useful.