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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Rash Under Armpits?

Hello! A few days ago I realized a rash under both of my armpits, and didn t think much of it. I had just switched to a new deodorant and figured that it might be razor burn or is just irritated. But today they are much more sore and very painful. I ve tried cleaning them why hydrogen peroxide thinking it was bacterial infection, but not sure where to go from here? I have good hygiene and had almost the same reaction a few months ago, closer to my chest. Any suggestions? Thank you! Joslin
Tue, 7 Apr 2015
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General & Family Physician,  's  Response
If you were to take a swab of your skin and grow the cells on a petri dish, you’d likely find lots of bacteria and fungal organisms living and growing without hurting your health.
While some fungal infections are not harmful, the candida fungus can be. This is because too much candida causes an infection known as candidiasis. While most candidiasis cases can be treated with improved hygiene, fungal infections can be very dangerous for those with weak immune systems.
Candidiasis of the skin is also sometimes known as “cutaneous candidiasis.”Contributing causes include:

warm weather
tight clothing
poor hygiene
taking antibiotics that kill normal flora
infrequent undergarment changes
affected immune system from diabetes, pregnancy, or other medical conditions as well as from medications, such as steroids
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What Causes Rash Under Armpits?

If you were to take a swab of your skin and grow the cells on a petri dish, you’d likely find lots of bacteria and fungal organisms living and growing without hurting your health. While some fungal infections are not harmful, the candida fungus can be. This is because too much candida causes an infection known as candidiasis. While most candidiasis cases can be treated with improved hygiene, fungal infections can be very dangerous for those with weak immune systems. Candidiasis of the skin is also sometimes known as “cutaneous candidiasis.”Contributing causes include: warm weather tight clothing poor hygiene taking antibiotics that kill normal flora infrequent undergarment changes affected immune system from diabetes, pregnancy, or other medical conditions as well as from medications, such as steroids