Mumps is a contagious viral illness that is best known for causing swelling near the cheeks and jaw. Although many people recover fully, mumps can sometimes lead to complications, especially in teenagers and adults. It spreads through saliva and respiratory droplets, which means it can move quickly in homes, schools and other close-contact settings. Vaccination remains the best way to reduce the risk of mumps and its complications. On this page What is mumps? 1. Symptoms can start before the swelling 2. Mumps spreads through close contact 3. Treatment is mainly supportive 4. Complications can happen 5. Vaccination helps prevent mumps Closing thoughts What Is Mumps? Mumps is caused by a virus that commonly affects the salivary glands, especially the parotid glands near the cheeks and jaw. This swelling can make the face look puffy and may cause pain when chewing or s...