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A 19-year-old male asked:

got my 2nd tb test 3 days ago. the doctor said my result was negative, but theres still a small bump. just scratched it since its itchy & its now red?

1 doctor answer1 doctor weighed in
Dr. Robert Kwok
Pediatrics 33 years experience
Doctor can recheck: A PPD test is where one needle injects a tiny amount of material under the skin. It is used to look for exposure to TB. The bump is measured, but mere redness is not measured unless it is raised above the normal skin surface. A bump is positive if 5, 10, or 15mm depending on the patient's circumstances. If positive or if worried, a blood test is done. Hydrocortisone cream may help soothe the spot.

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A female asked:

I have flea bites on my skin. How can I make them stop itching? And how can I repel the fleas from biting me!?

1 doctor answer2 doctors weighed in
Dr. Robert Kwok
Pediatrics 33 years experience
Over-the-counter med: For flea bites, one can take claritin, zyrtec, or Benadryl (diphenhydramine) to block histamine that causes itching. Hydrocortisone 1% cream 2-3 times a day on the bites for about 5 days will help them go away. For more itch relief, one can put an anti-itch gel such as "itch-x" on bites. Itch-x has an anesthetic to numb the itch. If bites are growing or painful, a doctor can evaluate. "deep woods off" repels fleas.

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Last updated Jul 22, 2018

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