Scabies is not caused by poor hygiene or being dirty.
It's important to keep clean and shower or bathe often to keep clean and wear clean clothes often but even if you stay dirty or never change your clothes that is not the cause of scabies.
You can be the cleanest person on earth and shower a thousand times per day and still get scabies.
Scabies is a skin disease that is itchy and highly contagious so if you are near someone who has scabies then the scabies can be transmitted from the infected person to you through contact.
The scabies is caused by the itch mite Sarcoptes scabiei.
To get rid of scabies you need to see your doctor and get a prescription ointment that kills off the mites that cause the scabies.
Home treatments can help but they will not get rid of the scabies fully.