peppermint oil for hair regrowth can burn when used alone without a carrier or inside a shampoo. You can try rubbing some coconut oil or another carrier oil on the scalp and then rewashing your hair but you may just have to wait a few days. In the future don’t just put strait peppermint directly...
Your hairs are thinning. You should use the blend of cypress essential oil it is good for making the roots of hair stronger and improve blood circulation.
I think if you have the hairloss or baldness problem so i should recommend you the essential hair growth oil, you should try and i hope you will get good result.
Have you tried any organic oil? I think organic oil will work for you I have a friend with the same issue she is using essential hair growth oil and her hairs somehow recovered in 3 months.