Answer:
Too much melatonin can have the opposite effect of its intended purpose. It can make it harder to sleep because your normal circadian rhythms will be disrupted. An overdose can also leave you feeling groggy and sleepy during the day and give you nightmares or extremely vivid dreams at night.
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Answer:
I'm thinking it's caused by blood clotting up
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-Lack of control.
- An inability to influence decisions that affect your job — such as your schedule, assignments or workload — could lead to job burnout. .
Unclear job expectations. 
- Dysfunctional workplace dynamics.
-<span> work overload
<span>- lack of recognition</span></span>