Hand at rest little finger crosses over ring finger at top thumb rests under pointer finger sharp pain in middle top of wrist shooting to elbow cause?

Nerve damage: It sounds as if your hand is spasming and possible nerve entrapment. See your doctor to determine cause.

We need imaging: You have imaging which you need to share. This could be arthritis, tendonitis or another soft tissue syndrome . Your description sounds like you have contractures a rheumatologist can help guide you to answer.

Carpal spasm: Have your doctor check your electolytes and mineral levels. Likely need calcium, potassium, or magnesium.