BMJ Group Medical Reference
Your blood can be checked in several ways to look for signs of Crohn's disease.
A full blood count (FBC) can show how many red and white cells you have in your blood. If you have too few red cells, it can be a sign that you've been bleeding inside your bowel. A high number of white cells can be a sign of inflammation in your body.
A urea and electrolytes (U&E) test checks how well your kidneys are working.
A liver function test (LFT) looks at whether your liver is healthy.
A test for C-reactive protein (CRP) looks for signs of inflammation. CRP is a protein that appears in your blood if there's inflammation in your body.
A blood test to find your erythrocyte sedimentation rate (ESR) is another way of checking for inflammation.
Inflammation is when your skin or some other part of your body becomes red, swollen, hot, and sore. Inflammation happens because your body is trying to protect you from germs, from something that's in your body and could harm you (like a splinter) or from things that cause allergies (these things are called allergens). Inflammation is one of the ways in which your body heals an infection or an injury.
Your kidneys are organs that filter your blood to make urine. You have two kidneys, on either side of your body. They are underneath your ribcage, near your back.
Your liver is on the right side of your body, just below your ribcage. Your liver does several things in your body, including processing and storing nutrients from food, and breaking down chemicals, such as alcohol.
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