When we refer to phlegm, it is commonly sticky, thick mucus that stays at the back of your throat when you are ill. It is a common occurrence when you have a cold. It captures many particles making it difficult for you to swallow food or drink any fluids. Mucus tends to secure your respiratory framework.

When you talk too much or shout at the top of your voice, you will experience an irritation or inflammation in your voice box. This could be because of any hidden infection or irritation in your larynx. Inside your larynx, there are vocal chords which form the sound through its movement and vibration.

Amongst the disease that has plagued the Earth, a majority of them have been eradicated. And, this we owe to the discoveries in medical science. However, there are diseases that still haunt us, since no permanent cure has been found for the same. Cancer is one such disease that cannot be completely cured.