Hello from JustAnswer. This is Dr. Love.
The medical term for this symptom is paresthesia. Paresthesia can refer to any altered sensation, so can include burning and tingling, but also includes any altered or funny sensation. Numbness is different, in that it is an absence of sensation, although numbness and paresthesias can sometimes happen together.
Since the paresthesia started after prolonged exertion using your pointer finger, this is almost certainly related to excessive pressure that has caused trauma to the nerves that travel through the finger to the tip. When this happens, it will almost always heal spontaneously, but it can take months to heal, as healing nerves grow slowly. To promote healing, it is appropriate to minimize further effort using this finger whenever possible. When you need to grip an object, try to primarily use the remaining fingers. If the pointer finger must be used, try to limit the duration of time that you use the finger and use many rest periods.
If there is any discomfort, swelling, or stiffness in the joints of the finger, it also may help to take an over the counter anti-inflammatory medicine, such as ibuprofen or naproxen. Moist heat also may help, as it also can relieve inflammation.
If I can provide any additional information, please let me know.