Ulcerations or sores cause mild to moderate pain and discomfort that is considered tolerable and does not limit normal functions such as eating, drinking and swallowing.
Severe mucositis
In people experiencing 5-FU or capecitabine toxicity, these ulcerations or sores cause severe pain and discomfort that is considered intolerable and significantly limits normal functions such as eating, drinking and swallowing.
Mucositis (Myewk-o-site-us) is the name of a condition that occurs when chemotherapy causes the mucous membranes that line the digestive tract to become inflamed. The most common symptom of mucositis is the appearance of ulcerations (sores) in the mouth and throat.5