In adults with mumps, there may first be some prodromal symptoms such as fever, headache, weakness, and loss of appetite, etc. Pain in the zygomatic arch and at the base of the ear may occur 1-2 days after the onset of the disease. Usually the parotid gland starts to swell from one side and progresses forward, backward and downward with the earlobe as the center. Usually the opposite parotid gland starts to swell around two days after the swelling, and the pain will be especially noticeable when eating acidic food, and some patients may also experience swelling and pain in the skin due to edema of the subcutaneous tissue. In addition, patients with mumps usually have a combination of enlarged submandibular glands and lymph nodes, which can also be painful. Adult patients are also prone to complications of mumps, such as encephalitis, and adult males are prone to orchitis, and adult females are also prone to ovarian inflammation.