If you dye your hair too much does your hair stop growing? Because it seems my friend's hair is getting thinner and stayed the same length ever since she cut it in the summer in June.
You hair won't stop growing. But dye your hair too much will definitely causes huge damage to your hair. You hair can become very thinner and fragile, very easy to broken. And the chemical dye materials can harm your skin which will make your hair grow slowly and not that strong as usual.
I dye my hair once a month. I buy hair dye without ammonia. For hair restoration I use products from argan oil, which make hair more healthy and strong. And also stimulate hair growth. My hair is thick and strong, thanks to this. Maybe this recommendation will be useful for your friend
You can always try hair extension stanchions to mix up the look, not stanchions like these but actual hair stanchions, make sure you put hair stanchions into google when searching.