The following files are provided to download tax rates for California Cities and Counties (all have 3 digits after the decimal). Please Note: Some communities located within a county or a city may not be listed.
The most common causes of hand or finger cramps or spasms are muscle spasm, diabetes, and carpal tunnel syndrome.
Possible Causes. 1  Carpel Tunnel Syndrome â If you have carpel tunnel syndrome, there is a nerve that is nicked in your wrist that passes through your carpel tunnel. 2  This is commonly done to help relieve pressure associated with the median nerve. 3  In doing so, it often leads to twitching of the thumb or index finger. Side Effects â Certain drugs such as diuretics, corticosteroids and estrogen are often causes of twitching in your fingers. 2  Caffeine â It is reported that too much caffeine or withdrawals of caffeine can cause muscle twitching. 3  This includes coffee, soda and chocolate.