thinning of the skin on your forearms can be attributed to a variety of reasons this includes a genetic predisposition weight loss and certain medications such as steroids (catabolic) can lead to thinning of the skin. also as we age the rate of collagen formation under our skin will decrease. this may also be a contributing factor to thin skin.
i have thin skin on my forearms. could it be hereditary and because of tanning as a teen?