“Nasal mucus that would necessitate a visit to your doctor may include frequent nosebleeds, nasal congestion that doesn’t go ...

Medically reviewed by Christine L. Larsen, MD Eye crust forms when mucus, oils, and debris accumulate, often during sleep.

Mucus provides an essential barrier for humans that protects vulnerable surfaces in the lung, intestinal, eye and reproductive tissues from invasion by bacteria, viruses, allergens and irritants.

When your cat’s sparkly, expressive eyes are suddenly goopy with eye boogers, you may be caught off guard. How did that ...