Scabies is caused by mites that burrow under your skin. One of the main symptoms of scabies is an itchy rash.
Scabies requires medical treatment. You need to take medication to kill the mites that cause the rash.
While you're not likely to die from repeated scabies infections, you can develop a bacterial skin infection as a complication. Any bacterial infection can become severe if left untreated. So, in an extreme case, you could theoretically become seriously ill from a bacterial skin infection that arises as a result of scabies.
Also, there's a certain type of scabies that can infest people with a weakened immune system (such as HIV). These scabies, called "crusted scabies" can cause massive breakouts. The risk of complications from crusted scabies may be higher simply due to the much larger infestation.
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