Pain in elbow/ upper arm is this related?

Dear Team,

I have been experiencing pain in my left arm, particularly around the elbow joint area, occasionally radiating up to the bicep/ shoulder area and/or down to my hand (around the thumb area).

The pain is not an acute sudden pain, it is more of a numbness/ dull ache feeling. This pain did occur initially about 6 weeks ago after using a hedge trimmer in the garden and the pain was acute for about a week, with reduced mobility of the elbow.
It then went away for about a week and is back as more of a dull ache and sometimes ties in with the numb feeling i get in my hand with carpal tunnel. (however the right side was always the worst with my Carpel Tunnel and not the left?)

I wanted to check if you thought that this could be connected? otherwise if its unlikely then i will happily arrange a review with the GP.

p.s the injection i had worked well, but after about 6 months i needed to go back to using my splints at nighttime (minimal day time symptoms)

Many thanks for your Help

Lindsay