Painful swelling on inner cheek, any help would be appreciated!

[ThrowawayAccount1234]

Apologies for the unglamorous photograph, I'm very insecure about my teeth due to antibiotics I had to take when I was younger,
Anyway,
I've had this swelling for about a week now and it ranges from being mildly irritating to reeeeally painful, as of writing this post it's about a 5/10.
I'm 18 years old.

Thanks in advance for any advice given!

 

[honestdoc]

Appears like pericoronitis. Your 2nd molar looks partially impacted. Usually the tooth erupts when you're 12. Try to go to the dentist for options like referral to orthodontist to upright the molar and maybe a prescription of Peridex 0.12% rinse for 2 to 4 weeks. Don't go beyond since it can darken your teeth.