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E asked in HealthDiseases & ConditionsSkin Conditions · 6 years ago

How long does a positive TB skin test rash stay?

Update:

I got a skin test for TB and it developed a red mark. The doctors did follow-up blood work to be sure I have TB. How long does the red mark typically stay because of the skin test. I read it may just be an allergic reaction. Should it go away on its own, or should I be calling my doctor? I figured I would mention it when they gave me my blood results, but they have not yet come in.

Also, do you know how long it typically takes to get that type of blood result back from Quest Diagnostics?

2 Answers

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  • Poostain
    Lv 4
    6 years ago
    Favorite Answer

    It's usually completely gone in about 5 days.

  • E
    6 years ago

    Ugh. I'm going on 6.

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