Swelling, pain, and pus in the gums usually indicate a dental infection, such as a gum abscess, which needs proper treatment to prevent it from spreading. For quick relief, you can rinse your mouth 2-3 times daily with warm salt water, maintain good oral hygiene by gently brushing, and take a pain reliever if needed. However, this is only a temporary relief; definitive treatment often requires a dentist to clean the infection, drain the pus, and sometimes prescribe antibiotics. Avoid squeezing the swelling yourself, as it can worsen the infection. It is important to visit a dentist as soon as possible for proper care and to prevent complications.