Thoracic or upper back pain is common. It is typically caused by poor posture or heavy lifting, which strains muscles, ligaments or the thoracic spine.
Crohn's disease is a form of inflammatory bowel disease characterised by chronic inflammation of the gastrointestinal tract and symptoms like diarrhoea.
Acid reflux is also known as gastro-oesophageal reflux disease (GORD) or heartburn. Reflux of food and gastric acid into the oesophagus causes inflammation.