Black spots on the back of the hand and forearm

There are many black spots on the back of my hand and forearm, so I feel self-conscious wearing short clothes in the summer because it looks messy.

It's okay if it's just one or two, but it's too many.

There are many. I guess I haven't taken good care of it regularly.

The skin on the arm is different from facial skin, so treatment for dark spots is

I heard that laser treatment is painful and very difficult.

Is it possible?