Adult mumps can be caused by viral or bacterial infections. The common virus that can cause mumps is the mumps virus, which causes mumps and is contagious. Other viruses such as influenza A virus, parainfluenza virus, coxsackie group A virus of the enteroviruses and lymphocytic choroid plexus meningitis virus can cause mumps and need to be identified based on serological tests and virus isolation. Viral mumps mainly present with non-suppurative swelling of the parotid gland, which can start with swelling on one side and spread to the other side later. The swelling is centered on the earlobe and spreads forward, backward, and downward, and the swelling may be accompanied by fever. There is no specific antiviral treatment for mumps, but rather symptomatic treatment. In case of fever, physical cooling or medication can be used to reduce the fever. If there is pain and swelling, it can be treated with analgesics. The mumps virus can invade not only the parotid gland but also other organs, so complications such as meningitis, meningoencephalitis, pancreatitis, orchitis, and ovarian inflammation can easily occur, especially for boys, who should pay attention to changes in the testicles if they develop orchitis. When you have mumps, you should avoid eating acidic foods to avoid stimulating the parotid glands to secrete saliva, and eat soft foods, as semi-liquid as possible, with as little chewing as possible. In addition to viruses, mumps caused by bacterial infections is purulent mumps, and treatment is based on antibiotic therapy.