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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What To Do For Itching And Swelling In Thumb That Spread To Arm And Under Armpit?

I just took my dog out to potty and something must have bit me on my thumb.. it started itching. and started to swell up. a few minutes later the itch was going up my arm and itching like crazy.. my whole right arm is red and its going under my armpit. What should I do?
Tue, 11 Feb 2014
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Dermatologist,  's  Response
Hi. Thanks for posting your concern at HCM

I would keep a possibility of insect bite hypersensitivity.

If I was your treating doctor I would have want to put you on oral antihistamines e.g cetrizine or loratadine twice daily for 5-7 days.

Considering the acute onset and rapid spread of swelling to your arm. it would be advisable to go to the emergency department. The doctor might feel the need to administer a shot of i/v steroid/hydrocortisone and i/v antihistamine e.g pheniramine maleate, to bring down the swelling and discomfort.

take care
regards
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What To Do For Itching And Swelling In Thumb That Spread To Arm And Under Armpit?

Hi. Thanks for posting your concern at HCM I would keep a possibility of insect bite hypersensitivity. If I was your treating doctor I would have want to put you on oral antihistamines e.g cetrizine or loratadine twice daily for 5-7 days. Considering the acute onset and rapid spread of swelling to your arm. it would be advisable to go to the emergency department. The doctor might feel the need to administer a shot of i/v steroid/hydrocortisone and i/v antihistamine e.g pheniramine maleate, to bring down the swelling and discomfort. take care regards