There are several types of mites that can infest humans, including:

* Scabies mites: These burrow into the skin and cause an itchy rash.

* Demodex mites: These live in hair follicles and sebaceous glands. While usually harmless, they can cause skin problems in some people.

* Chiggers: These are the larval stage of a mite that bites and feeds on human blood, causing itchy welts.

It's important to note that spiders are not parasitic. They are predators and don't typically live on humans.