The important symptom if there is a blockage of blood flow through the celiac artery (into the stomach and liver) is pain in the abdomen after eating a meal. Feeling your pulse when lying down is actually not uncommon in thin people such as yourself and while it may create an uneasy feeling, it is usually nothing to be concerned about (unless the prominent pulse is caused by an aortic aneurysm..and this is very easy to determine with an ultrasound exam..which you have already had). It is rare for a person to have a clinically significant problem with blood flow to the stomach and intestines if the only problem is a blockage of blood flow through the celiac artery. The reason for this is that there are other arteries which also supply blood to these organs. The superior mesenteric artery is the other main source of blood to the stomach and intestines. I hope you have had a consultation with a specialist. If you have not, I recommend that you ask your primary care doctor to refer you to a certified vascular surgeon. Celiac Disease- When people with celiac disease eat gluten (a protein found in wheat, rye and barley), their body mounts an immune response that attacks the small intestine. These attacks lead to damage on the villi, small fingerlike projections that line the small intestine, that promote nutrient absorption. When the villi get damaged, nutrients cannot be absorbed properly into the body. The only treatment currently for celiac disease is a strict, gluten-free diet. Most patients report symptom improvement within a few weeks, although intestinal healing may take several years. Celiac disease is hereditary, meaning that it runs in families. People with a first-degree relative with celiac disease (parent, child, sibling) have a 1 in 10 risk of developing celiac disease. Celiac disease is also known as coeliac disease, celiac sprue, non-tropical sprue, and gluten sensitive enteropathy. For your problem I would first rule out Amoebic or Bacillary dysentery. It is commoner infectious cause of blood in stools. Also Piles have to be ruled out by examination although the risk is more in a setting of constipation. Since you will need a prescription if you have dysentery anyway, you will need to see a Gastroenerolologist. So do it fast. Godspeed.