Welcome to health care magic forum.
Thanks for sharing your concern with us.
Have you consumed any allergic food or drinks?
Do you have the habit of smoking/tobacco or pan chewing?Vitamin deficiency
or medication administered can also cause such swelling.
I would advice you to get a thorough clinical evaluation by a dentist
Avoid intake of spicy foods,smoking ,pan chewing.
Maintain oral hygiene
Usually in such cases,vitamin becosules
as well as steroids are prescribed.
I would advice you to maintain oral hygiene well.
Take a balanced ,nutritious diet.
Hope this helps out.