Chemical peel. I have swollen bumps on my forehead. Is this normal?

Hi there. Im having a chemical peel, my first 2 series had no effect on my face so the doctor gave me a stronger treatment today, he said it's number 3...I have no idea what it means. He gave me at least 10 injections where the pigmentation is then he put a burning liquid on my face using a brush. I noticed that I have swollen bumps on my forehead and it's swollen on my cheek...these are the areas he injected. Is this normal?