Generally speaking, yawning is a normal physiological reaction. The first thing you should check is whether you have any bad habits such as staying up late. If you have any obstructive sleep apnoea syndrome, such as snoring at night, waking up and daytime sleepiness, you should also check if you have any other symptoms. If all of the above are ruled out, then brain disorders should be considered. If frequent yawning is accompanied by severe or new headaches, nausea and vomiting, then brain disorders are highly suspected and a neurology clinic can be consulted to determine if there are any cerebrovascular diseases or intracranial tumours.