Can dandruff cause hair loss?

It is unlikely that dandruff is causing hair loss. This requires an in-person evaluation. I suggest seeing a hair loss expert now to evaluate and go over your condition and provide you information about your best treatment options. There are great non-invasive options like prp/progesterone and/or hair transplantation. See an expert. Best, Dr. Emer

In short, yes; specially if you are susceptible to male pattern hair loss.  Dandruff is caused by irritation of your scalp and the more irritation your scalp has  (dermatitis) the more inflammatory process that goes on in your scalp, and the more scarring of your follicles occurs. To keep your hair as healthy as possible, your scalp must be as healthy as possible. If you do get dermatitis of the scalp and dandruff, coal tar  would be a good solution for it to use and your shampoo until resolved.

I would suggest making an appointment with your physician to review the exact cause of your concerns. He or she will review your concerns and examine your scalp carefully. In general, dandruff does not cause hair loss unless  it is very severe.

How many hairs? Just saying you saw some hair fall out is really vague so there's no way to really tell you what's going on with your scalp. In general hair shedding is normal as long as you can't feel a difference in your hair density, and dandruff doesn't cause hair loss.

Dandruff can not cause hair loss unless you scratch it and scratch out the hair producing traction alopecia