You will know that a man is blushing based on how he acts and the way that he looks. A blush may affect the different parts of the body but it will become most evident through the person’s face, neck, and ears. There are different reasons why a man can blush. One reason is that the man likes you and he is nervous about talking to you.
Another reason is the man is thinking about you and he feels like you can see through him. He may be terrified that you know how much he likes you. Men will try not to get embarrassed as much as possible but when talking to someone they like will already be enough to make them blush
You can know that a man is blushing by the way he acts. Men blush when they are totally into a woman and they cannot control or hide it. It's usually a sign that a man is interested in you.
You can tell that a man is blushing from his face. If he has a big smile that is more than normal, he is most definitely blushing. If a man is with you and he is sweating or his face feels warm, its probably a sign that he is blushing.
Slouching with the head down is a sign of shyness, it can also be a sign that he is blushing.