You know when you toast a piece of bread and it's crispy, golden, and makes little crumbs when you handle it? Your hair shouldn't be like that. Mechanical damage comes from your heat styling tools. Even if you're being careful, you can still really hurt your hair. Over a surprisingly short amount of time, you can melt your hair shorter and shorter. You need professional tools and heat protectors for insurance. You also need to understand what your hair can take, and some basic styling tips to keep you from burning your hair.
The Proper Tools
Using the proper tools is crucial. You should be able to control the heat setting on your irons and you need to use a heat protector every time you put the heat tool to your hair. Oils and serums are not heat protectors. Think of what happens when you put oil in a hot pan and then put a piece of food in there. Oils and serums are conductors, not protectors.
Healing Burnt Hair
Depending on how badly it's burnt, there isn't a lot you can do about it. Replenishing the moisture should be your primary focus until it starts to feel and act like hair again. Get regular trims and invest in the right shampoo, conditioner, and leave-in treatments to nourish your hair back to life.
You'll find everything you need by clicking the links below.