Infestations by mites and ticks are known as Acariasis.

Reptile mites (Ophionyssus natricis)
are without doubt one of the greatest killers of captive reptiles and are rare.

Yet if or reptiles do have them  is a great tragedy as they are so easy to control.

A mite infestation is usually indicated by one or more of the following:

Unusual restlessness in the reptile (usually in the early stages of infestation)
The reptile seeking to immerse itself in water
Unusual digging activity
White specs of dust (mite droppings on the scales)
Scales taking on a raised appearance
A loss of appetite
A rapid loss in condition (as infestation advances)
General listlessness (usually in advanced cases)

If you have good records, you'll also notice an increase in shedding frequency and/or a shedding brought on prematurely as a result of the mite infestation.
 

These tiny arachnids live under scales. They are usually hard to see, except where they congregate around the eyes, under the anal plate and similar places.

If you suspect that your reptile has  a mite infestation you should immediately check the suspected reptile and all others in your collection.

Mites, if present can often be found drowned in the water bowl, where they take on the appearance of flecks of pepper. They may also be found hiding under scales in the places just indicated and as opaque flecks under scales elsewhere on the body, but particularly under the larger ventral scales.

With care, one or more mites can be removed and you will see them move. When in large numbers they kill the reptile by removal of blood and poisoning what's left.  Post-mortem's usually reveal death by septicemia. Ophionyssus natricis which is the species most commonly seen on reptiles is usually brown in colour, although when filled with blood may take on a reddish hue.  They breed very rapidly (a 30-90 day lifecycle in most cases) and there are five stages in the life-history. The younger stages are microscopic and hence it's generally only the adults that are seen by the reptile keepers. As already mentioned, the white droppings from mites are usually visible on the scales as white dots. In particularly bad cases mites themselves will be seen walking over the reptile. The first three indicators above of mites, all reflect the efforts of the reptile itself to remove the mites. infected reptiles commonly soak themselves in a bid to drown the mites. This works well in the wild situation, but in captivity any relief is only temporary at best. Another indicator of mites is when a non-digging reptile starts to dig excessively or becomes unusually active. This may be the reptile trying to literally scrape the mites off the head or hoping that the mites will fall off.

WHAT YOU CAN DO

You can bath your reptile twice a week making it soak for a while in warmish water, fill a large container with a lid up  with warm water enough water to soak and enough space for your reptile to have his/her head above  water.. make sure the lid has air holes.

While your reptile is soaking you can clean the viv ...completely empty the viv and place the water dish and other items into hot water with a mild disinfectant. Get rid of all the wood chips, then completely spray the viv with reptile spray and scrub.. then place news paper  NOT the wood chips in

After your reptile has soaked for around  1 hour  take him/her out wipe gently with old towel place him/her back into the viv... Making sure all the bleach has been rinsed of all the items from the viv place them back..

Do this routine three times in one week until  you feel happy enough to know your reptile is clear.
There are loads of reptile keepers who use sprays, powders' bug strips, oils, I find the frightening  The OIL will clog the reptile scales and the scales need to breath, Bugs strips placed in the viv and in the  warm water bath ..oooo Not sure about this... All I know is my way worked.. when I got a corn snake wanting a good home it came in with mites so I had to clear him other wise my whole collection would of got them.