Eating Disorders Question

Hi, welcome to the ehealth forum and I am glad to help you.
You seem concerned by the pain in abdomen that is increased on sitting up or when you touch the abdomen. You have also made a mention of IBS.
Abdominal pain is a very common symptom of IBS but it is a diagnosis when all other serious organic causes have been ruled out by physical examination and relevant investigations such as ultrasound etc. The functional pain of IBS is usually not associated with any nausea, vomiting and is usually brought on by stress. Causalgic pain is one which may be precipitated by touching the abdomen but rigidity is usually absent.
You must consult your doctor to establish if the pain has some organic cause behind which will need prompt management.
Hope this helps. Take care.
Note: This post is not to emphasise final diagnosis as the same cannot be made online and is aimed just to provide medical information and no treatment suggested above be taken without face to face consultation with health care professional.