Skin lesion aspiration is the withdrawal of fluid from a skin lesion (sore).
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 a special laboratory dish (called a culture medium), where it will be watched for the growth of microorganisms.
There is no special preparation for this test.
If the abscess is deep, the health care provider may inject a numbing medicine (anesthetic) into the skin before inserting the needle.
You may feel a pricking sensation as the needle enters the skin.
In many cases, the removal of fluid will decrease the pressure within the irritates skin sore, and relieve your pain.
This test is used to help determine the cause of a fluid-filled skin lesion. It can be used to diagnose skin infections.
Abnormal results may be a sign of a bacterial or fungal skin infection.
There is a slight risk of bleeding, mild pain, or infection.
Review Date: 10/28/2008
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright ©2010 A.D.A.M., Inc., as modified by University of California San Francisco. Any duplication or distribution of the information contained herein is strictly prohibited.
Information developed by A.D.A.M., Inc. regarding tests and test results may not directly correspond with information provided by UCSF Medical Center. Please discuss with your doctor any questions or concerns you may have.