The opponens pollicis muscle contributes to pain in the lower thumb and wrist.
The adductor pollicis muscle contributes to pain in the thumb and thumb pad.
Abductor digiti minimi hand muscle contributes to pain on the outside of the hand radiating up into the little finger. Pain can be sharp when moving the little finger. The outside pad of the hand will often have a dull ache.
The lumbrical muscles of the hand contribute to pain in the back of the hand and the fingers. Pain in the index finger and the little finger are the most common. Stiffness in the finger joints mimics arthritis pain. Stiffness and pain when opening and closing the hand is also common.