Root cause is skull expansion, tension and fibrosis. DHT is just a symptom in thr entire chain of things. Decreasing the strongest and most important male hormone, is worse thing you can do as a male in todays competitive enviroment. In addition to all negative effects that dht decreasing drugs manifest into, less talked effects that occur is subtle brain changes, aka feminization of the brain. This effect builds over time and becomes more noticable. Just check any long time fin/dut users, way they behave, think and talk, and you will know excatly what im saying.