I am a 19 years old boy, I started suffering from men pattern baldness at age of 17 as my father is bald. What do I do?

If you are losing hair and want treatment options you should schedule a consultation with a doctor.  Your doctor needs to give you treatment options (after seeing you).

Yes, you would need to continue using Minoxidil to keep your results. I suggest seeing a hair loss expert 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

Minoxidil (5%) is an FDA approved treatment for androgenetic alopecia which is likely what you have. Some folks see shedding when they start Minoxidil, and also see shedding when they stop. You need to take it for a minimum of 3 months before discontinuing to ascertain for sure if it is not working. Even though it is applied topically to your scalp, it can have systemic effects (dizziness, low BP, arrthymias). If these happen, you should discontinue the medication. It may work for many months and then stop working.  If it is working, you will be taking it forever, but only 2-3 times/week.  Your alternative is LLLT.  While a quality laser unit is expensive, over the long run it is the least expensive option. Finally, if neither of these approachs work, you should consider PRP.

because you are young you should have a consultation with a hair restoration surgeon to have your scalp and hair evaluated, discuss the preventative medications, as well as formulate both short term and long term plans. The key is to prevent further loss and keep your native hair for as long as possible.

Your biggest enemy is the progressive thinning leading to a balding pattern that is not evident at this point in time. The degree of thinning that you are experiencing would suggest that you should see a doctor who most likely will get Bulk Measurements of your hair to determine the degree of the thinning that you are presently having. If the diagnosis is early genetic hair loss (the most common cause of hair loss in young men), then the best treatment would be the drug finasteride which is highly effective in men of your age and may not only stop the hair loss but possibly reverse it. If you are developing a more advanced balding pattern the best test to get will determine the Bulk Measurements of your hair and this will show, over a one-year time frame, how effective the treatment will be. Once you know this information, then you and your doctor need to develop a MASTER PLAN which will define what you need to do over the years to come.