My son has query Post Viral Dysmotility Syndrome. Hesuddenly starts vomiting constantly unable to eat or drink fluids needs sudden redyration via drip and cyclyzine. He has lost considerable weight 2 stone. He had another episode 2 weeks ago and hasn't been able to eat or drink properly. Just as we thought he was getting over it. He has had stomach pains more weight loss and diarrhoea for 5 days. The stool is very dark brown / black/ green and lots of mucus. No one seems to be doing anything. He hasn't been eating for 3 weeks, and has lost another stone. We thought he might have Crohns or ulcerative colitis but we are desperate now and don't know where to turn My son is only 29 years of age. It started at 21 with a bout of Gastroenteritis and this seems too have started the post viral dysmotility syndrome? he looks dreadful and very thin. The episodes seem to becoming more frequent 5 episodes last year within 4 months. He always seems to have mucus problems in stool constantly with urgency to go to toilet.