Hi @NIG . Thank you for your question!

In this scenario it would be prudent to see a doctor for full examination. Patients often don't realise if they have weakness if it is very slight and this would usually require examination by a physician. Though, given the activity that you think might have caused it, it sounds very unlikely that there could be a nerve injury involved or at worst maybe a mild compression of one of the small branches of the nerve from pressure. 

Best to see a doctor early if it is bothering you for some reassurance! Hope this helps!

Hi @NIG , sounds like it’s possible that it was difficult for you to grasp and your might have placed excessive pressure around your thumb/wrist region. I would advise that if the numbness worsens/appears to spread to your other fingers (mainly index and middle finger)/ start feeling weak and unable to grip objects, you should see your GP. 

Of note perhaps you can consider a trial of neurobion which has shown some evidence in treatment of nerve related inflammation/numbness/pain. 

At present it does not sound very serious but it does seem to be bothering you. I always tell my patients if something is bothering you/impairing your life, it is worth just getting it checked as soon as you are able. Like I mentioned, most of the causes are relatively benign in my experience. 

Oh though this does not sound like it could possibly be a stroke, always be aware of alarm symptoms in the neurological symptoms which includes (but not limited to) things like half body parenthesis/weakness/loss of balance/loss of spatial awareness/facial asymmetry/blur vision/speech or swallowing impairment/fainting of unknown cause. 

I hope this helps!