If your mucus is gray or black... …you likely inhaled dark-colored particles, like smoke from a fire or heavy exhaust. Regular smokers can also blow out darker mucus because of the tar or other toxic ...

Of the four main eye colors (brown, blue, green, and hazel), the rarest eye color is green. However, new classifications say another color is even rarer: gray. Brown is the most common worldwide, ...

We already know how much emotion the eyes can show, but it turns out that they also play a role in our personalities. According to research, your eye color says more about your personality than ...

Mucus is a substance that lines the moist surfaces of your body, including the lungs, sinuses, mouth, stomach, intestines, and eyes. “It is mainly a combination of water and large molecules ...

The three types of eye care professionals are optometrists, ophthalmologists, and opticians. An optometrist is licensed to examine eyes and diagnose and treat eye problems. An ophthalmologist performs ...

When a person has black or dark-colored mucus, they may have inhaled potentially harmful pollutants. Coughing up black mucus may also be due to an underlying infection or condition. Mucus serves ...

An eye and orbit ultrasound uses high-frequency sound waves to measure and produce detailed images of your eye and eye orbit (the socket in your skull that holds your eye). An eye and orbit ...

The causes of a headache behind the eyes range from eyestrain to migraine. Over-the-counter medications and home remedies can often help, but some may require medical care. Headache behind the ...

In some countries, if you’re willing to write a sizable check, you can become a citizen. The United States is apparently poised to become such a country. By Steve Benen UPDATE (February 26 ...

If your eyes bulge more than is typical, it could indicate a serious health condition like hyperthyroidism. It’s important to share your symptoms and medical history with your doctor.

First, it’s important to know that fish are covered in a thin layer of mucus. This slimy coating (it is also called a “slime coat”) is known to keep fish healthy by warding off pathogens.