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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes A Bruise With Hard Lump After A Bite By Black Widow?

I was bitten by a black widow about 2 weeks ago on my forarm. The bite swelled up and I have a bruise about 3 inch radius around th bite. The bruise is still pretty big and the spot where the spider bit me is sore and has a hard lump. But the bump area did not bruise. How long does it take to heal? Is this normal for a spider bit? I was put on anitbiotics for 10 days, which was up yesterday.
Mon, 13 Apr 2015
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General & Family Physician 's  Response
Hi,
In general, the bruise you're mentioning is a localised reaction to the toxins of the bite.
It should be resolved itself in a few days time.
However be a little cautious about it, sometimes secondary localised infection can occur at the site.
If you feel something like the bruise is containing pus or is leaking liquid, should consult your GP for incision and drainage of the wound.
In most probability, it should heal by itself.
Get well soon.
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What Causes A Bruise With Hard Lump After A Bite By Black Widow?

Hi, In general, the bruise you re mentioning is a localised reaction to the toxins of the bite. It should be resolved itself in a few days time. However be a little cautious about it, sometimes secondary localised infection can occur at the site. If you feel something like the bruise is containing pus or is leaking liquid, should consult your GP for incision and drainage of the wound. In most probability, it should heal by itself. Get well soon.