It is due to viral infection specifically the paramyxovirus group.
any
What causes your lips to swell and go numb
Infections causes it to swell
genetics
The unusual birthday ritual in Fish Cheeks causes a vivid picture.
what causes broken vains in your face
Polio virus causes poliomyelitis.
Tonsillitis
maybe a cyst
It's the same virus that causes chicken pox - the herpes virus.
The HIV virus causes AIDS. HIV stand for Human Immunodeficiency Virus.
Rabies belongs to the Rhabdovirus family. The virus that causes rabies is the lyssa virus.