It might be Pinworms. See related link below.
Skip to the section on "Life Cycle" to read all about them. They can be treated by taking an antibiotic such as mebendazole (prescription) or Pin-X (OTC).
If you feel like something is crawling on you
Parasitosis (illusory or delusional)
The sensation of something crawling at the top of your butt crack could be attributed to a few factors, such as irritation of the skin, muscle spasms, or even the presence of hair. Additionally, nerves in that area can be sensitive, leading to unusual sensations. In some cases, it might also be caused by anxiety or heightened awareness of bodily sensations. If the feeling persists or is accompanied by discomfort, it’s advisable to consult a healthcare professional.
I would go see your doctor.
Well when you start to make a move at a dance or something slowly head your hands for her butt. When or if you get that far squeeze if she likes it she'll laugh if not you still got to feel her butt.
ummmmmmmmmmmmmmmm....... well..... you might have a tape worm
When the flow of blood under that particular part is minimal then you might get such a feeling.A2:You might actually have something crawling under your skin. It wouldn't be a bad idea to take your skin to a doctor. There are a number of parasites that might be responsible.
Because It's something to stick your penis in, and they feel great.
it feels like something is crawling in my back and my head why?
Maybe you should ask one.
If you feel something moving in your "butt" it is usually air made by the intestinal bacteria. However if this movement is accompanied by itching, then you should see your primary physician. It might be pin worms or another intestinal parasite.
biologically saying yes as crawling as for a spider is walking & creeping is when u want something in shock