Hi..
Welcome to HEALTHCARE MAGIC...
I have gone through your query and can understand your concerns..
As per your complain it is not normal to have swelling and pain in cheek after dental fillings is not a normal finding..
If you have swelling and bruising immediately after dental anaesthesia was given then it is possibly given into the venous plexus ( a meshwork of veins) leading to
Hematoma formation..
The swelling and pain can also be due to irritation of nerves in the tooth that are filled, if filling is done accidentally directly over the nerve..
Consult an Oral Physician and get evaluated and an
x ray can be advised for diagnosis..
In case if it is due to Hematoma formation then it will resolve gradually on its own..
You can do alternate warm and cool compresses over the swelling..
In case of
nerve irritation and inflammation, filling has to be removed followed by
Root Canal treatment of the tooth and a course of antibiotics and painkillers..
Hope this helps..
Regards.