There are many reasons for yawning, most of which are not disease related, such as being in a bad environment like bars, internet cafes, buses, etc. or lack of sleep due to heavy workload, staying up late, or being tired.
However, if you find that the frequency of yawning has increased significantly recently compared to the previous period, and there is no significant relief after regular diet and rest, you should promptly visit a hospital for head CT, vascular ultrasound and other tests to treat the cause according to the cause.