Hope, I get that too. It is sort of funny but very strange. I had a single mastectomy so I have one natural breast & nipple and one implant reconstructed breast with no nipple. (I replied to this post because the itching problem happens to some of us whether we've had reconstruction or not).
If it has been many years since a person was infected with TB, his or her initial skin test may be negative, because of waning immunity. Subsequent tests may be positive, however, because the initial tuberculin placement stimulates the immune response to the test.
The possible reasons for a negative test in a person who genuinely has Lyme disease are: 1  The test was carried out too early.  The early immune responses fluctuates, as found by a German study[2], so any early test is a âsnapshotâ which may be positive or negative.