ما هي أسباب كثرة التثاؤب لدى شاب في الثالثة والعشرين من عمره؟

Yawning is from Satan. Whoever feels it should try to suppress it as much as possible, place their hand over their mouth, and lower their voice, because Satan laughs at them. Its cause is the body becoming full and heavy from excessive eating. Its remedy is to reduce that, and one can seek help by frequently seeking refuge in Allah from Satan to repel yawning.