Don't hold on to yawning. It gives the activity

There are days when one can't stop yawning, but in some situations yawning can be awkward, for example, yawning at work can make you look like you're bored or uninterested. But it is better not to curb the need for yawning.

Yawning gives the body activity and a sense of alertness, and in some situations when yawning is inappropriate, it can be quietly inhibited. There are no negative consequences for the body. It's helpful to know that if you're feeling tired at work, yawning once or taught your mind some fresh air. It also helps to get up from time to time and makes your circulation continue to function and brings oxygen and therefore activity into your body.