Doctor insights on:
What Does Your Arm Look Like After A Tb Test
Mycobacterium tuberculosis is an infectious organism that spreads by droplets coughed out by an infected person. Infection is established initially in lungs, but can spread within lungs & to other body parts, or can become latent, with reactivation occurring years to decades later. With effective treatment, it can be completely eliminated although drug resistant ...Read more
I had a TB test done last Tuesday, the nurse said I am negative but I still have a red bump that looks like a mosquito bite on my arm. Is this nor...
TB Test: A positive test is measured by induration that is palpated on your arm - not by overlying swelling or bump ...Read more
Hard to say...: If you got the test and your arm swelled up shortly afterwards, its possible that either you had an allergic reaction to the test, had a test site infection, or had an unrelated injury while sleeping or (if you had a blackout) were otherwise not aware of your surroundings. Go back to the doctor who gave you the test and have them look. ...Read more
See below: A positive PPD is determined by the presence of swelling (induration) around the injection site. Little or no swelling indicates a negative test. Reddness is not used to determine a neg or pos test. ...Read more
Positive PPD test: A positive TB test should look like hard, raised bump with size >5to15 mm depending of the risk category you are in. It should be read in between 48 to72 hours. It is the hardness and not redness which is read. Thanks. ...Read more
Doc: Either your blood test igra is negative or your skin testing does not show any "bump". This should always be checked by a professional since even health care workers report false results. Best to check with a doc and not pa or np or nurse. ...Read more
What is important: Is what it feels like - not how it looks. Induration is palpated & measured. Treatment (such as INH) is determined once it is established where this is latent or active TB and the type. ...Read more
TB Tests: I bet you could google image that question. A positive reaction is read after 48 hours from the test. It would be a raised redness greater than 5 mm in circumference. ...Read more
No: Tanning is not safe and is not recommended for anyone. It increases the risk of skin cancer and accelerates facial and body aging. Sunscreen with titanium and zinc can help protect you from uva and uvb rays, but avoiding sun exposure is best. Spray tanning and tanning lotions are a reasonable alternative to achieve a bronzed look, but they may not be safe for pregnant/ lactating women. ...Read more
The next step: Is to obtain a history, a physical examination and chest x-ray. Latent vs active TB are handled very differently. ...Read more
Is it normal to have a tiny bit of blood after a TB test? The blood is dry now and is less than 1/10 cm. Got the test today. Bleeded right after shot.
Yes: The standard TB skin test usually involves a small needle injecting test material under your skin. To get it in the proper location the needle will often cause a small amount of blood leak out at the injection site. ...Read more
How badly does a TB test hurt? I'm extremely terrified of needles and would like to know how bad it will hurt.
None: It does not hurt much. You would feel it as much as you feel an insect bite. To distract yourself get an activity going while it is being done. Goodluck ...Read more
Chest X ray: It is possible to have active TB with very little symptoms especially early on. However, it is more than likely that you carry the germ for TB in a dormant form, this is called latent tb. No symptoms are expected with latent tb. ...Read more
If there is a bump: When TB infects the body the infection gets walled off by antibodies. The medical person injects a manufactured antibody under your skin that reacts to the TB antibody. If a bump appears at the injection site after 48 hours it means you have the antibody to TB already in your body and therefore have TB infection. It does not mean that you have active disease or are contagious. ...Read more
Generally 6 weeks: The need to repeat a TB test generally depends on each individual's previous test results, presence of symptoms & risk factors for exposure to tb. An interval of at least 6 weeks is generally recommended. Talk to an infectious disease specialist for proper interpretation of your testing. ...Read more
Size of induration: After the TB test, the skin at the site can develop swelling (induration). The size of this swelling (measured in millimeters by a health care provider within 48-72 hours) determines whether you have a positive result or not. It is important to not measure the area of redness but the actual size of the swelling around the test site. The cut off value for positive test is based on yr risk factors. ...Read more
Yes: The TB test can become positive within the first day in someone that has been exposed to TB in the recent past. ...Read more
Yes: But such early reactions do not reflect a positive test. ...Read more
Depends: If your doctor suspects that you have open pulmonary tuberculosis, you could be prevented from going to work. ...Read more
Usually unknown: The reasons for false positive PPD are unknown. There is speculation that it could sometimes result from past infections with various TB-like bacteria. Such infections aren't very common, but they are equally frequent in the Netherlands as anywhere else. As long as the tested person is outwardly healthy and definitely does not have tuberculosis, this is nothing to worry about. ...Read more
Negative, give time: As long as there was no hardened lump at the infection site within that first 72 hours that was greater than 15mm (or less if you have risk factors), you are still considered negative. It can take some people up to a week or so for the redness and swelling to recede. Try ice several times a day to help with any swelling. ...Read more
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