Hi and welcome to HCM As you have mentioned, dandruff and oily scalp can cause hairfall as it also makes you prone to fungal infections. Do remember that your scalp has an oily nature similar to people with oily skin, and requires continuous care. You will have to start an anti dandruff shampoo twice weekly as advised till the dandruff is in control, after that you must continue at least once weekly to maintain. Do not apply extra oil or styling products on the hair. Other causes for your hair fall maybe stress, pollution, change in water, any recent illness like typhoid, any hormonal or menstrual disorders, thyroid problems, hair straightening etc. It may also be genetic. if you can identify a cause , avoid it and make necessary changes. It is also important to eat nutritious diet and rest well. Low iron etc can also cause it. You can start biotin 10mg capsule daily for 2 months. Once the dandruff reduces, you can apply Tress gro hair serum at night. Wash with shampoo like anaphase etc. Do keep in mind that it will take a month or two to see results. Hope this helps.