Blood tests may be done if your symptoms are severe or to rule out other causes.

Tests may be ordered to rule out other medical causes of symptoms.

You may feel that more testing is needed to rule out serious causes.

Now we have to rule out other causes for his behavior.

Check with your doctor or dentist to rule out other causes of mouth pain.

Doctors often run tests to rule out other possible causes of symptoms.

Blood and x-ray tests can be needed to rule out other potential causes.

It is impossible to rule out other possible causes of the infection.

Therefore, it's important to consult a health care professional immediately to rule out other causes.

However, in these cases, one must still rule out other secondary causes.