Generally speaking, the swelling of lymph nodes under the ears after a child’s cold is caused by the localized spread of the cold, because most of the colds in children are related to viral and bacterial infections. Inflammation in children’s oropharynx or nose will spread to the surrounding area through the local lymphatic vessels, thus causing lymph node enlargement under the ear, and even submandibular and cervical lymph node enlargement, which is a very common phenomenon. For children with enlarged lymph nodes under the ear, Pu Di Lan Anti-inflammatory Oral Liquid can be used to clear away heat and detoxify the toxins, reduce swelling and dissipate the lumps.