Assuming you're male. Some of these products wouldn't be suitable for females of child-bearing potential. Topical minoxidil, in 2% & 5% formulations. Oral Finasteride which reduces transformation of testosterone to dihydrotestosterone, the cause of male-pattern baldness. Laser combs. I don't know how effective these are. Hair transplants. Scalp reduction.
ALOPECIA TX. Alopecia or hair loss may be multifaceted . You need full Exam &lab work up especially Vit d/Thyroid studies /TESTOSTERONE/ b12 and folate. If they are normal start high dose Biotin zinc B12 and folic acid.. Rogaine (minoxidil) and Propecia may be helpful. If there is no improvement consult dermatology for biopsy to rule out auto-immune ALOPECIA AERATA.. With supplements start low and go slow.