finger vs back of hand in Korean
손가락vs손등

손가락finger
A finger is one of the five parts at the end of your hand. In Korean, 손가락 means finger, and people use this word when talking about pointing, touching, counting, or pain in the hand. You will often hear it in everyday situations like washing your hands, showing something, or wearing a ring.
When to use finger
손등back of hand
손등 means the outer side of your hand, not the palm. People use this word when talking about washing, hurting, or putting something on the hand. You will often hear it in simple daily situations like skin care, small injuries, or showing your hand.
When to use back of handHow they differ
손가락 means one of the long parts on your hand that you use to point or hold things. 손등 is the flat top area of the hand behind the fingers.