i wnt to ask that there is any harmfull side...

Dear Customer
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treatment of hypersomnia :

1. overwatch your sleeping pattern and pay attention to the triggering causes 
2. make sure that you are not taking any medication that causes sleepness as a side effect 
3. use the different normal ways to stay awake during day time such as coffee 
4. doctor may prescribe medication such as modafinil to treat your medical condition
5. avoid stress and anxiety

complications of hypersomnia :

1. effects on body weight
2. effects on memory and mood status 
3. social effect
4. loss of concentration especially in important moment such as driving 
5. depression 

our advice :

hypersomnia  isnt dangerous as you think , but its more likely effect on your social life such as work or family and may lead to depression , we advise you to follow our advices and visit neurology doctor to do the needed medical examnations and determine treatment pathway if needed 
You can also ask our other certified experts in various fields such as: Nutritionists, Lawyers, IT Experts, Therapists, Mechanics, Doctors, Handymen, and more.
Kind Regar

dear customer , you are welcome 
best regards