What does ot mean if hands always go numb and is worst while laying down as if somebody is sitting on your arms?

Likely nerve: Most common cause is carpal tunnel syndrome, with nerves compressed at wrists, perhaps secondary to keyboarding. Although might wonder re nerves higher up in arms, this is less likely. Could wonder about a neck issue (stenosis?), and recommend you see your doctor and perhaps get films of neck. An EMG study will probably confirm cts.

Carpal Tunnel Synd: You most likely have carpal tunnel syndrome. You should see a qualified hand surgeon.