Some reasons why the fingertips can go numb include pressure on the nerves, lack of blood supply to the fingers, nerve injury, carpal tunnel syndrome and diabetes, notes MedlinePlus. Patients should discuss their symptoms with their doctor to determine the exact cause and appropriate treatment.
One of the causes of numbness to the fingertips is a lack of blood supply to the area. This can occur due to frostbite, inflammation of the blood vessels, or atherosclerosis, notes Medline Plus. Enlarged blood vessels can also place pressure on the peripheral nerves, which can cause the fingertips to go numb. Other causes are multiple sclerosis, lack of certain vitamins and certain medications, states Medline Plus. In rare cases, the numbness is due to brain or spinal cord problems, notes WebMD.