How the test is performed: A needle is inserted into a skin lesion or skin abscess, which may contain fluid or pus. The fluid may be examined under the microscope or placed in culture medium to observe for the growth of microorganisms.
How to prepare for the test: There is no special preparation for this test.
How the test will feel: If the abscess is deep, a local anesthetic may be injected into the skin to numb the area. There will be a pricking sensation as the needle enters the skin. In many cases, the removal of fluid will decrease the pressure within the tense, irritated lesion and relieve the pain.
Why the test is performed: This test is used to help determine the cause of a fluid-filled skin lesion. It can be used to diagnose skin infections.
What abnormal results mean: The results may indicate a bacterial or fungal skin infection.
What the risks are: There is a slight risk of bleeding or infection.
