It's probably a medical problem.
I've checked in several places and it looks like no one knows.
Ravi Ross on Disney Channel series Jessie lip was swollen on one of the episodes probably a medical problem
Karan Brar
just a chemical reaction, for a guess
Christian Ravis was born in 1613.
Thomas Ravis was born in 1560.
Christian Ravis died in 1677.
Donald Ravis was born on 1940-02-28.
Thomas Ravis died on 1609-12-14.
a ravis...
Ravis
jessie j
Cyber-Lip happened in 1990.