Inexplicable irritability of mood. If you are relatively young, have no history of chronic illness, and just recently feel inexplicably irritable mood, it indicates a recent emotional problem, which may be related to anxiety, stress and emotional tension, and can be adjusted by yourself. Try to increase the time to go out, increase the time to sleep at night, and do not stay up late. If you still can’t improve after adjusting by yourself, you can seek professional medical consultation, such as psychiatry or psychology, to do an assessment on anxiety and depression and clarify whether anxiety and depression exist. In reality, anxiety and depression are prevalent and significantly more prevalent, but one cannot ignore that there are indeed clinical disease problems, such as elevated blood pressure. If blood pressure is recently elevated, it may be accompanied by dizziness, headache, and head swelling. Patients who have underlying cardiac ischemia may also have changes in mood. Inexplicable mood irritability can also occur if there are endocrine abnormalities, such as hyperthyroidism.