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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Is The Cause For A Blister On Top Of The Anus?

My two year old had a blue black blister type spot at the top of her anus this afternoon. It is no longer there but she does smell a lot in that area - I am missing something but not sure what. She has woken once or twice every night this week and is often hot. Her poo is generally very hard.
Wed, 8 Jul 2015
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Pediatrician,  's  Response
Hi, If I were your treating Doctor for this case of blister, I would come up with such possibilities, these include: the lesions as vesicles is more consistent with Herpes; the best diagnostic methods include a scraping, tincture (called Tzanck) and viral culture of the content of one of the lesions; serum antibodies for Herpes 1 and 2 can also be ordered, but, it is better to assess the lesion contents directly.
1. hot Bath: To a tub of lukewarm water add 2 spoons of antiseptic solution or baking soda. Sit in it immersing bottom for 15-20 minutes each session twice a day.

the warmthness will reduce pain and also help in drainage

2. Dry the area after bath and apply antibiotic ointment-1% Chloramphenicol.

3. Analgesic like Ibuprofen will help relieve pain

4. If following up will not work then use oral antibiotics(amoxicillin) for 5 days and discuss this with your treating Doctor.
Start on these changes and get back to me in 1 week. Wish you and baby good health.

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What Is The Cause For A Blister On Top Of The Anus?

Hi, If I were your treating Doctor for this case of blister, I would come up with such possibilities, these include: the lesions as vesicles is more consistent with Herpes; the best diagnostic methods include a scraping, tincture (called Tzanck) and viral culture of the content of one of the lesions; serum antibodies for Herpes 1 and 2 can also be ordered, but, it is better to assess the lesion contents directly. 1. hot Bath: To a tub of lukewarm water add 2 spoons of antiseptic solution or baking soda. Sit in it immersing bottom for 15-20 minutes each session twice a day. the warmthness will reduce pain and also help in drainage 2. Dry the area after bath and apply antibiotic ointment-1% Chloramphenicol. 3. Analgesic like Ibuprofen will help relieve pain 4. If following up will not work then use oral antibiotics(amoxicillin) for 5 days and discuss this with your treating Doctor. Start on these changes and get back to me in 1 week. Wish you and baby good health.