Head question

Jacqueline • Associates, Bachelors and Masters Degree Holder 🎓3.97 GPA🤓Certified Debater🗣Mommy Of One☝🏽
So I really like and I mean I reallllllllly like giving my partner head. But I've noticed that when I do it, sometimes the top of the shaft right under the head gets red. He says it doesn't hurt but I've never noticed it before. Is it normal after giving head???