How long have you had the tremor?
Any problems with walking?
Do you take any medication?
Thanks for the extra information. A long term tremor may be something called 'benign essential tremor' which is something that is irritating and is worse on movement but absent at rest.
It is often worse with caffeine and tiredness, but if it is becoming more troublesome then you need to speak to a neurologist. It can sometimes be improved with beta-blockers or other medication.