pain in wrist could be due to many reasons
if its acute with swelling it could be due to injury or sprain
chronic with no swelling it could be due any systemic disease
Pain in the left wrist could be due to a musculoskeletal or a stress related problem. If you are typing a lot on your comp, then even that is a possible cause for you to have such issues. Blood pressure spikes should be kept under control with medications, diet and exericse.