<s>[INST] I have sebum on my head if it is due to DHT level. are they related to each other? I m 24 yrs old yet i m on second stage of hair fall.also after applying Amexidil 5% I faced much hairs falling I applied it Once a Day first.also how to know this is working or not 3 weeks are done. applying it twice from yesterday If it will work. [/INST] Hello, Sebum production and DHT levels are related. You should apply Amenexil twice daily for at least 3-4 months to see results.Only 3 weeks of use won’t help in stopping hair fall. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Asmeet Kaur Sawhney, Dermatologist </s>