Why Are My Mosquito Bites Only Behind My Knee?

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Discussion Overview

The discussion centers around the cause of multiple insect bites experienced by a participant, specifically located behind the knee. Participants explore various possibilities including mosquitoes, fleas, spiders, and other insects, as well as potential skin reactions. The conversation includes personal anecdotes and observations related to insect bites and their characteristics.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant reports multiple bites in a small area behind the knee, questioning how mosquitoes could have reached that spot while ignoring other exposed skin.
  • Another participant shares a similar experience in Japan, noting a different skin reaction and expressing confusion about the source of the bites.
  • Some participants suggest fleas as a possible cause, noting their tendency to bite multiple times in the same area.
  • Others propose that spider bites could be responsible, particularly in creases where skin is thinner.
  • There are mentions of dog mites and chiggers as potential culprits, with some participants recalling past experiences with similar bites.
  • A few participants discuss the possibility of heat bumps or cholinergic urticaria, which can resemble insect bites.
  • Some express uncertainty about the identification of the bites, with differing opinions on their characteristics and origins.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the cause of the bites, with multiple competing views and hypotheses presented throughout the discussion.

Contextual Notes

Some participants reference previous similar experiences, suggesting a potential seasonal correlation, but there is no verification of the specific cause of the current bites. The discussion includes various assumptions about the nature of the bites and the insects involved.

  • #31
Update:

Have not been outside at all tonight, and am not wearing the same pants as before. Have been sitting here on the couch in the living room for the last few hours, minding my own business.

I now have a small grouping of bites on my right thigh.

As I now recall, in the 2008 incident, the couch was the prime suspect.
 
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  • #32
DaveC426913 said:
Update:

Have not been outside at all tonight, and am not wearing the same pants as before. Have been sitting here on the couch in the living room for the last few hours, minding my own business.

I now have a small grouping of bites on my right thigh.

As I now recall, in the 2008 incident, the couch was the prime suspect.

7APEW.jpg
 
  • #33
damn. when sitting outside and there are bugs, i just fart to keep em away haha!
 
  • #34
haha. Way to make a good first impression stink. :rolleyes:
 
  • #35
DaveC426913 said:
Well, then they waited around for 12 hours before biting.

It's not totally impossible; or it could be a delayed reaction, too (especially if they turn out to be bed bugs or fleas). I once had a wasp inside my undershirt which was content until about 5 hours later...

...I thought I was going to die.
 
  • #36
Maybe it's hives?
 
  • #37
DaveC426913 said:
Update:

Have not been outside at all tonight, and am not wearing the same pants as before. Have been sitting here on the couch in the living room for the last few hours, minding my own business.

I now have a small grouping of bites on my right thigh.

As I now recall, in the 2008 incident, the couch was the prime suspect.
Do you have a dog or cat? The mites responsible for causing sarcoptic mange may find living on your pet intolerable if you have used Front-Line or other similar treatments on your pet, and they WILL bite you. I visited a friend whose dog was suffering from mange earlier this summer and sat with the dog for a while (he's a pretty chummy mutt). By the time I got home, I noticed three mosquito-bite-like welts on the underside of my forearm, and they itched like crazy for days. They were pretty much gone in under a week, but were far more persistent than mosquito bites.

BTW, any place that has a population of fox, coyotes, etc will have these mites, and pets will bring them into your home from outside, even if they have been given flea/tick treatments.
 
  • #38
DaveC426913 said:
haha. Way to make a good first impression stink. :rolleyes:

haha thanx
 
  • #39
turbo-1 said:
Do you have a dog or cat? The mites responsible for causing sarcoptic mange may find living on your pet intolerable if you have used Front-Line or other similar treatments on your pet, and they WILL bite you. I visited a friend whose dog was suffering from mange earlier this summer and sat with the dog for a while (he's a pretty chummy mutt). By the time I got home, I noticed three mosquito-bite-like welts on the underside of my forearm, and they itched like crazy for days. They were pretty much gone in under a week, but were far more persistent than mosquito bites.

BTW, any place that has a population of fox, coyotes, etc will have these mites, and pets will bring them into your home from outside, even if they have been given flea/tick treatments.

The only pets I have would result in drowned fleas...
OK, unless you count the Roomba as well.


I hate to suggest it but frankly, both my chill'uns spend all their time at their gf's houses, who do have cats. And both were here that day.
 
  • #40
Downdate (opposite of an update):

The bites on my right thigh are nowhere near as itchy as the ones under my left knee. 12 hours later, I'm not even sure they're still there.

The bites under my knee have finally receded. Still a little swelling and itch, but both are down by about 80%. (Actually, that didn't take as long as I would have thought. It's been barely 4 days.)
 
  • #41
Dembadon said:
In https://www.physicsforums.com/showthread.php?t=262090" thread, which was created around the same time of the year (fall) about two years ago, you had a similar episode. Chemisttree thought they might be chiggers (post #15). Could this be a repeat occurrence? Were you able to verify if they were chiggers or not?

I was just thinking the same thing. Of course I remembered the post for some reason.
 
Last edited by a moderator:
  • #42
Are you sure that it isn't just heat-rash, Dave? Face it, dude, your thighs are bigger around than my entire body, and the back of the knees is one of the few holdouts wherein the sun never shines.

Just thinking out loud...
 

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