The tremors occur because of some weakness most of the time or some people have it in Heredity . If it is light then I don't think you should go to doctor until you feel it hard. However, to be on the safer side, you can consult with doctor at any time.
I Am Starting To Experience Very Small Tremors In My Right Hand Only, They Are Very Light But Repeat Quite Often. Should I Consult A Doctor?
Use your common sense. You don't know what's causing the tremors, so don't you think it would be wise to find out? Such symptoms can be caused by a variety of conditions. It's usually a good idea to find out what the problem is sooner, rather than later.