What could be the cause for numbness in my right hand from shoulders to fingers?

Many things: The problem could or be anywhere from the spinal cord, to a nerve root to the brachial plexus to a peripheral nerve. A brain problem is less likely since you do not mention a problem with your face. A neurologist can help determine what the problem might be. The cause of this type of symptom is usually not serious, fortunately.

C6 cervical radiculo: Radiculopathy shoulder to fingers most likely most comon even withhout neck pain cervical MRI to confirm after dr eval and pexam look for disc herniation at c56 anything else is incidental for these symptoms , with TIA history unlikely cerebral event is on differential see neurologist review and control vascular disease risk factors.

Possiible the neck: Numbness is usually a neurologic complaint. There may be a number of possible causes of shoulder pain and hand numbness. One possible cause is a "pinched nerve" in the neck. Consider seeing a dictor for an exam and appropriate studies. Thank you for the question.