2 doctors weighed in:
What does a positive PPD test feel like?
2 doctors weighed in

Dr. Martin Raff
Internal Medicine - Infectious Disease
1 doctor agrees
In brief: Firmness
The diameter of the circle of hardened skin at the site of the PPD is measured, and depending upon who you are, what underlying diseases you may have, what medications you are taking, it is read in 48 hrs.
Do not measure the area of redness, only the area of firmness (induration). Otherwise there are seldom other symptoms.

In brief: Firmness
The diameter of the circle of hardened skin at the site of the PPD is measured, and depending upon who you are, what underlying diseases you may have, what medications you are taking, it is read in 48 hrs.
Do not measure the area of redness, only the area of firmness (induration). Otherwise there are seldom other symptoms.
Dr. Martin Raff
Dr. Martin Raff
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