This condition is most often seen with enlarged lymph nodes or localized cysts. In children, normal lymph node tissue exists in the neck, behind the occiput, in front of the ear, behind the ear, and under the jaw, which does not cause enlargement. However, when there is a decrease in the body’s resistance, viral and bacterial infections, most commonly upper respiratory tract infections, the lymph node tissue can reactively proliferate, leading to enlargement or inflammation. If the lymph nodes are simply swollen and there are no other symptoms, they can be observed for a while, and as the primary disease improves, the lymph nodes will slowly subside, in some cases over a longer period of time. If the swollen lymph nodes lead to septic infection, those with significant pain need to visit the hospital for ultrasound and, if necessary, oral anti-inflammatory drugs. In severe cases, if an abscess is formed, an incision and drainage is required.