1. Excessive fatigue and sleepiness 2. Decreased amount of sleep 3. Prolonged sleep deprivation 4. Stress 5. Sleep apnoea 6. Insufficient oxygen in blood 7. Boredom 8. Exposure to other people yawning 9. Migraine 10. Headache 11. Epilepsy 12. C

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1. Excessive fatigue and sleepiness  2. Decreased amount of sleep  3. Prolonged sleep deprivation  4. Stress  5. Sleep apnoea  6. Insufficient oxygen in blood  7. Boredom  8. Exposure to other people yawning  9. Migraine  10. Headache  11. Epilepsy  12. C
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LoL by: grandamjim
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