What’s happening is you’re losing the collagen in your skin.
DHT is a vital hormone in the production of collagen. It is the fuel of your skin as a male. It produces the sebum, the oil, the collagen, the acne, everything. Without it, your skin is dead, dry, and will age like crap.
This is one of the few sides that every finasteride user will get. If your DHT is lowered then so will the quality of your skin, period. This side is treated the same as any other PFS side, i.e. it is not treated unless you’re willing to do steroids and anabolic drugs for the rest of your life.
Don’t bother using retin-a or any other skin cream. You can try, if you really want to, but without DHT your skin cells are frozen and won’t produce collagen even with the most rigorous skincare routine. Retin-a can dry your skin ever harder and irritate it without much gains in the appearance. This is one of the main side effects I got with my treatment.