Scalp itchy red acne, hairloss, dandruff

For many years, I've been dealing with scalp issues. I've acne on my scalp, which is the most severe. My scalp is also itchy and flaky all of the time. It's difficult to determine if it's oily or dry, but I always have some irritation throughout the day. My mental health is declining as I also have bald spots due to massive hairfall. My doctor in India prescribed me Doxycycline, Allegra, and ketoconazole but I never got cured, these meds provide some comfort just for a few days. Because of the constant itching and suffering, I am unable to concentrate on my work and studies. On a daily basis, I notice that my scalp is bleeding. My scalp becomes even more itchy and a patch of acne appears when I wear a woolen cap, which is why I can't go out on chilly days. I'm continuously thinking about it because I can feel it growing across my back and chest, and I'm seeing red rings on my body.