Losing hair

To

I recently grew my hair out from a pixie cut. I end up putting it in a ponytail almost everyday because it gets in the way. I know that's causing hair loss and I'm working on not putting it up as much. I was wondering if anyone has any advice on how to strengthen my hair? I use tea tree oil mint shampoo and conditioner. I haven't been using any heat. Indo have dandruff, which is why I use the tea tree oil shampoo and conditioner