It can spread and effect the other organs in your body.
If left untreated it can kill you.
cholera can kill you in a matter of weeks if left untreated
Yes, if left untreated in an immunocompromised patient. Can depend on the cause of pneumonia however.
It can not directly kill you. Although if it is left untreated it can cause complications that may result in death.
It causes nerve damage!
Untreated, it can kill.
Mycobacterium leprae is the bacterium that causes leprosy, a chronic infectious disease affecting the skin and nerves. It mainly affects the peripheral nerves and skin, leading to skin lesions, nerve damage, and disfiguration if left untreated. Leprosy is treatable with antibiotics, but early diagnosis is crucial to prevent complications.
See a doctor immediately for removal or a course of antibiotics to kill the worms. They can be a severe detriment to your health if left untreated.
Acid reflux can cause cancer of the throat if it is severe and left untreated for a long period of time. The disease itself will not kill you in your sleep.
Chlorine or an alternate form of sanitizer is necessary to kill bacteria which would grown in pool water if left untreated.
Rust is a fungal disease that can harm plants by weakening them and reducing their ability to grow and produce. In severe cases, rust can kill plants if left untreated.