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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Swollen Purple Rashes On The Body After Mosquito Bite?

Hi,
I was outside 3 nights ago and was bitten by lots of gnats/mosquitoes (25 times to be exact). I woke up the next morning and the bites were quite normal however began getting much bigger and more red, and a lot itchier. The next day they were even worse and today they the swelling has gone down but now they are flat and a purple colour. They have a red dots on them and look quite blotchy. One of them has a red line across it. I'm just not really sure whether they are just healing or it is something more than that.
Thank you for your help.
Wed, 24 Aug 2016
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General & Family Physician 's  Response
Mosquito bite induces allergic reaction in the body. Allergies occur when your immune system reacts to a foreign body. Foreign body may medicine like pollen, animal dander, dust and insect venom etc. mosquito are known to transmit Dengue, malaria, filarial and chikungunya fever.
Advice
1.     Levocetirizine5 mg – 1 tablet per oral once daily for 3 days
2.     Do not scratch too much as it will caused skin damage and infection
3.     Calamine lotion – three times daily locally
4.     Use insect repellent such Odomos cream or use mosquito net
5.     Avoid sleeping outdoor
Thanks
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What Causes Swollen Purple Rashes On The Body After Mosquito Bite?

Mosquito bite induces allergic reaction in the body. Allergies occur when your immune system reacts to a foreign body. Foreign body may medicine like pollen, animal dander, dust and insect venom etc. mosquito are known to transmit Dengue, malaria, filarial and chikungunya fever. Advice 1. Levocetirizine5 mg – 1 tablet per oral once daily for 3 days 2. Do not scratch too much as it will caused skin damage and infection 3. Calamine lotion – three times daily locally 4. Use insect repellent such Odomos cream or use mosquito net 5. Avoid sleeping outdoor Thanks