Conversation: The conversation between human and AI assistant.
[|Human|] Experienced some pain in my stomach area, around the belly button.  There seems to be a lump or sometning like a small ball at center left side of the button.  If I am sanding stright, i may feel some discomfort.  When I feel the pain coming, i have to move slowly.  If I sit, it becomes worse and when I lay on my back for a period, it becomes less painful.  Can you tell me any causes for this?
[|AI|]  Hello! Thank you for the query. Your symptoms are very characteristic for umbilical hernia. Due to a small hole in the abdominal wall, fat (and sometimes intestines) from the abdominal cavity gets out. This gives pain and discomfort. The pain is usually more intense when standing, lifting or coughing. When laying down, the lump can be less visible. I suggest you to visit a surgeon with this hernia. A surgery needs to be done to fix it and set you free from the pain. Hope this will help. Regards.