Why do I always have to reboot my router

without details, we don't know either. 

What router do you have? 

What modem is it connected to? 

What firmware is on the router? 

what actual issue are you having that causes you to reboot? details help so we can help you. 

Why do you have to reboot my router?

 

Without knowing what prompted you to reboot the router, who knows?

 

Probably because something happened and you decided to reboot the router.

 

It could be that something else needed fixing.

 

'What goes wrong? What are you doing in response? What happens then?

 

You can help people to help you by providing the information suggested in this forum's header:

 

Subject (Include model number and brief summary)
Model (Recommended - Helps the community give the best answers)
Body (Include additional detail including model version, firmware, OS and environment where relevant.)

They are there for a good reason.