hi, welcome to health care magic
Numbness in the first three fingers corresponds to area supplied by a nerve called the median nerve
Compression of the nerve can occur. Compression at the wrist when it passes under a sheath is called carpal tunnel syndrome
Carpal tunnel syndrome is associated with different conditions, some of them are: related to work, obesity,pregnancy
,diabetes, any external force exerting pressure on the tunnel, elevated levels of certain hormones.
It is diagnosed based on history, examination and electrophysiological testing by the doctor. You should consider visting your doctor for an evaluation of the numbness
Treatment may involve use of braces, injectable steroids, surgical release.
I hope this is helpful to you