Obviously aging is the primary cause for aging hands, but more specifically, factors like excess sun exposure, volume loss, and less collagen and elastin in skin tissue as you age make the skin look older.
Lifestyle factors like smoking, diet, and general health also play a role in how your hands age.
Age spots / sun spots
Sun damage
Skin laxity
Volume loss
Lines and wrinkle
The best way to increase collagen in your hands is with a treatment for collagen induction therapy. This is the technique of creating controlled injury in the skin to trigger the natural wound-healing response. BBL Hero and Halo laser are two great options to promote collagen products in this area.