Right upper abdominal discomfort can be caused by many reasons, such as contusion, cholecystitis, hepatitis, costochondritis and so on. 1. Contusion: lack of preparatory activities before strenuous activities, resulting in muscle, tendon, ligament and other parts of the tension caused by injury, pain, resulting in discomfort in the upper right abdomen. 2. Cholecystitis: Inflammatory reaction of the gallbladder, causing distension and discomfort in the right upper abdomen, nausea and vomiting, anorexia and other symptoms, and severe fever may occur, resulting in discomfort in the right upper abdomen. 3. Hepatitis: viral infection, heavy drinking and other causes of liver inflammation, often accompanied by pain in the liver area, fatigue, nausea, decreased appetite, resulting in right upper abdominal discomfort. 4. Costochondritis: bacterial infection, trauma, etc., cause inflammatory reaction in the cartilage at the junction of sternum and ribs, resulting in symptoms such as chest tightness and enlargement of the inner cartilage. The pain is aggravated by deep breathing and coughing, causing discomfort in the right upper abdomen. Right upper abdominal discomfort, it is recommended to go to the hospital in time for examination, to clarify the cause of the disease, and active treatment.