It sounds like your hair loss is secondary to scalp inflammation and scratching. Since there is no family history of hair loss, resolving the scalp irritation should allow your hair to fully recover. I recommend trying over-the-counter medicated shampoos containing ketoconazole, selenium sulfide, or zinc pyrithione to target common causes of itching like dandruff. Shampoos with salicylic acid or coal tar can also soothe irritation. Use these 2-3 times a week, leaving the lather on your scalp for five minutes before rinsing. Please see a dermatologist for a definitive diagnosis. This is a very common, highly treatable issue, so try not to worry!

Persistent dandruff is very common and highly treatable. If regular shampoos haven't worked, you may need a stronger medicated option. Look for shampoos containing active ingredients like Ketoconazole (an antifungal), Selenium Sulfide, Coal Tar, or Salicylic Acid to help clear the buildup. For the best results, gently massage the shampoo into your scalp and let it sit for 5 to 10 minutes before rinsing thoroughly. You can alternate between two different active ingredients if one stops being effective. If you don't see improvement after a few weeks, please consult a dermatologist, who can rule out other conditions and prescribe stronger targeted treatments.