One doctor thought the bleeding, strange bumps on Aaron Dallas' head might have been a gnat bite. A specialist thought it was shingles, though both doctors held out the possibility that it was something else.
Then the bumps started moving.
A doctor found five active bot fly larvae living on Dallas' head, near the top of his skull, a few weeks after a mosquito apparently placed them there.
"I'd put my hand back there and feel them moving. I thought it was blood coursing through my head,'' said Dallas, of Carbondale, Colorado, USA.
"I could hear them. I actually thought I was going crazy.''
Dallas likely received the larval infestation on a trip to Belize this summer.
Mosquitoes, stable flies and other insects are used by female bot flies to carry their eggs to the host, in this case Dallas.
"It was weird and traumatic,'' Dallas said. "I would get this pain that would drop me to my knees.''
When the pain got worse, Dallas returned to Dr. Kimball Spence.
"When I saw him again, it was pretty obvious something else was going on,'' said Spence, who could see the spots moving on Dallas' head. "There's an open pit. You see a little activity, not necessarily the larvae, but a fluctuation of the fluid in the pit,'' Spence said.
The parasites, which were living in a pit 2 to 3mm wide, were removed. His wife teases him about it now.
"It's much funnier to everyone else,'' Dallas said. "It makes my stomach turn over. It was cruel.''
Spence said bot fly infections are fairly routine in parts of Central and South America.
Ian: Man, I'm itching all over.
Claire: What from? Got a rash?
Ian: No, I went outside last night and got about 100 mosquito bites.
Claire: Ouch, that doesn't sound like my idea of a good time.
Ian: No joke. I'll probably be itching for days.
no joke 可不是嗎，沒錯
People say no joke when they agree with what the last speaker just said. If someone says to you, "I bet you wouldn't want to get stepped on by an elephant," you could reply with, "No joke."
當人們同意最後一位說話者的話時，就會說「no joke」。假如有人說「我打賭你不想被大象踩過」，你就可以回答「no joke」。