It could be a parasite or an eczema.
This could be an allergy. It could be parasites besides fleas. A vet check can answer this question for sure.
allergy
No, chickenpox typically starts off as little red bumps that turn to blisters, then sores, then scabs. Scabs are the last phase.
Flea nests
because it wants you to get stronger
i sudgest u get it medication for its scabs but i also sudgest taking a warm cloth and rubbing its feet if it bites you then it means its too hot so get a cold cloth and rub with no pressure
No because it can cause scabs around their mouth
Scabs and irritation around your dogs anus and surrounding areas can indicate worm, fleas or another problem. Take him in for an examination to be sure.
because when you bleed the blood hardens and turns into scabs
Your cat could have fleas. Look on her scalp, especially behind the ears to see if you find any. If the problem doesn't go away, take her to a vet.
you get scabs when you scratch and your blood hardens when you leave it untreated.
Are you feeding your guinea pigs apple? Some guinea pigs are allergic to apples, and scabs can appear around their mouths. I would stop feeding them apple, but I think you should really take your guinea pig to the vets if this happens.