Lymph nodes can be swollen due to any reason MS can be one reason. Lymph nodes are small swellings found at intervals along lymphatic system. These are also found near ear. They act as filters for lymph, preventing foreign particles from entering bloodstream. Swollen lymph node of ear can cause hearing loss. The patients of lymphoma (Malignant tumor of lymph node) of ear have multiple enlarged lymph nodes cells and may have constitutional symptoms. This can also affect hearing and visual properties of affected person.