Gintama Season 4 Episode 25

Gintoki’s mouth is swollen like crazy, forcing him to go to the dentist for treatment. Unable to cope with the stress and pressure of waiting, a crazed Gintoki screams for someone to just kill him and be done with it. After getting scolded by the staff, Gintoki waits for his turn when another man with a swollen mouth comes in, making things even more complicated!