Many people do not develop symptoms when they become infected with the mumps virus, so they may never know they had the infection. Others develop symptoms such as fever, swollen and tender parotid glands (the salivary glands located beneath the ears), and headache. Other possible symptoms can include fatigue, loss of appetite, and muscle aches. The swollen salivary glands typically appear about the third day of the infection, with the more nonspecific symptoms occurring earlier. The gland swelling can last up to 10 days. Symptoms in adults tend to be worse than those in children.