"Thick mucus" refers to the fluid that is usually present in certain parts of our body, like our nose, throat, and lungs, being denser or more viscous than normal. Full definition
Although this crippling, fatal disease is not discussed as often as cancer or heart disease, this particular condition attacks the lungs with thick mucus, as well as the pancreas. (healing4soul.com)
As a result, a person with CF will have thick mucus affecting several glands in the body. (momsteam.com)
It is good for thin or thick mucus as the level of suction can be controlled while ensuring the comfort of the baby. (momwoot.com)