What is wrong next to my guinea pig?

so im holding my guinea pig right now & it had some sort of mini seziure.
also theres some kind of guinea pig dandruff or dry skin(its approaching little white clumps) all over his lower back. & he seem sensitive whenever i touch it. & i can verbs clumps off hair off his rear legs! but everything is fine on his head & upper back.
whats wrong with him? how can i facilitate him?
HELP!
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He may own mites as if left with them they find it bloody if you touch them and start to lose fur. i would get him to the vet right away as the sooner you go and get him there the better off he'll be.
Hope all go well.
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He does need to budge to the Vet.

It sounds like it might be mites or a fungal infection.

Guinea Pigs can have small seizures when they hold these conditions. I have seen these before; I cogitate it may be from scratching.

These conditions are relatively easy to treat but he must go to the Vet.

Good luck
Take him to a vet! No matter what's happening, it's not worthy!
TAKE HIM TO S VET
Answers:    Yes he needs to see a vet.
He is suffering from Sellmick mange. The mini fits you are seeing is the either the time he scratched himself the irritation has become insufferable or a place where it is hard to reach.You may spy that they actually hold there breath when this happens. This is a fundamentally serious disease caused by the mite TRIXACARUS CAVIA. It causes severe itching and scratching. The mite bury themselves below the skin to lay the eggs. Once hatched they proceed to the surface of the skin. It is the actual egg shells that are left behind that cause the irritation. They cavies body tries to rid them but can't which then causes inflammation in which they continually chisel at. The cavy will emaciate and die if not treated.
To give him some Relief while waiting to see a vet bath him to remove as much loose skin and spine . This will help him a great deal as its slows the hatching process for a little.

I treat all my 150 cavies at home every 3-4 weeks with IVERMEC.
A drop down the ear and orally 0.50 ml twice yearly when the mite are active.

Hope adjectives goes well.
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