What precautions should I take before taking a blood stool test?

Avoid red meat. The tests are very sensitive for blood in your stool and if you eat red meat it may be a false positive as the "blood" would be from the red meat and not your bowels.
Food. Some fruits contain chemicals that prevent the guaiac, the chemical in which the test paper is soaked, from reacting with the blood. Aspirin and some nsaids irritate the stomach, resulting in bleeding and should be avoided prior to the examination, along with red meat and many vegetables and fruits containing vitamin c. All of these factors could result in a false-positive test.

Related Questions

3 months ago I had Nausea for 2 weeks. No diahrea or fever. Blood/stool test negative for everything. Now I have only nausea again. What could be?

Nausea. This can result from central nervous system issues, problems in the semicircular canals, GI issues, pregnancy and a wide variety of other issues. If this continues, seeing a good diagnostician (Family practitioner or general internist) might be a way to start to evaluate this. Good luck. Read more...

Why am I still losin weight? Blood work was fine. Stool test came back no parasites and no blood in stool. I have a small lump in neck that's moveable lymphoma? I also have a cough and feel fine!

Weightloss. Unexplained weightloss is always suspicious for malignancy and lymphoma in your age group would not be unusual. What do you mean "blood work was fine"? what were you tested for? Read more...
Continue workup. A few screens for malabsorption / maldigestion are in order. A diet history may be helpful as well. Trust you had a thyroid check. Cystic fibrosis and gluten enteropathy are only two of dozens of things that can present at your age. Every 18 year old has at least one small movable lump in the neck -- if it were lymphoma, it'd be obviously abnormal. Read more...
See below. Weight loss in a otherwise healthy and asymptomatic young person is unlikely to be due to significant underlying illness in the absence of abnormal routine labs or an abnormal physical exam. Be sure to check thyroid function and have a chest x-ray. Then monitor your weight and see your physician every 4-6 weeks for a reevaluation. Have Dr re-ck neck lump next visit>often a benign lipoma or cyst. Read more...

I occasional have 3 bowel movements a day, not much comes out each time. Multiple Blood, stool test NEG ibd, parasite etc. More likely ibs?

Possibly IBS. These symptoms don't sound worrisome, unless this is a distinct change your bowel habits. For it to be IBS, the symptoms would have to persist for six months or longer. If the change in your bowel habits persists, or if you see any blood in your stool, or if you have unexplained weight loss, I would contact your doctor immediately. Otherwise, I would recommend a high-fiber diet. Hope this helps. . Read more...