4. Infection
Infections can be minor or severe. When a cut on our hands gets infected, usually some rubbing alcohol will do the trick and the problem will disappear.
However, some infections can be fatal or at least can be severely debilitating. It all depends on where the infection spreads. If an infection stays on the surface of the skin and does not spread to vital organs, it can be dealt with easily unless gangrene sets in.
However, if an infection is internal and spreads to the brain, vital organs can be disrupted. A person could experience an infection on the section of the brain that affects the processing of speech.
A person may still be able to speak, but they will not be able to emphasize the correct syllables or may speak too loudly or too softly. When the infection clears up, a person may or may not return to normal speech, but in some cases, there can be permanent damage.