Conclude that yawning is a normal human may occur for several reasons, such as fatigue, insomnia, lack of sleep, eat too much starch, etc. Yawning and no harm, no need to hold to yawn. But if you feel refreshing recommended to drink more water.Try in a well ventilated environment fresh, not stressful and breathe in and out ลึกๆ to feel refreshed. Find time to relax enough. And exercise regularly, it will help to find a long decline. But if symptoms yawn.Such as, ah, the sleepy time, although much sleep, fatigue, think not. ปวดศีรษะช่วง wake up after more fat. Cold, constipation. Depression, etc., should see a doctor to find the cause.
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