When you’re battling a cold or a cough, one of the most annoying things is the mucus (or snot) that accumulates in your nose and throat.

But did you know that the color of your mucus can actually be an indicator of your health? Here’s a guide to what the different colors of mucus mean.

Clear Mucus

Clear mucus is the normal, healthy state for your nose and throat. It helps trap dirt, dust, and other particles and prevent them from entering your body.

You may notice an increase in clear mucus when you’re in a dusty or smoky environment, or when you’re exercising.

White or Gray Mucus

If your mucus is white or gray, it could be a sign of hay fever or other allergies. It could also be a sign of nasal polyps, which are small growths inside your nose that can make it difficult to breathe.

If you have white mucus and have been experiencing nasal congestion or difficulty breathing, you should see a doctor.

Yellow or Green Mucus

If your mucus is yellow or green, it’s usually a sign that your body is fighting an infection. The color comes from white blood cells, which are responsible for fighting off bacteria and viruses.

If you have yellow or green mucus, you should rest, drink plenty of fluids, and avoid contact with others to avoid spreading the infection. If your symptoms last longer than a week or two, you may want to see a doctor.

Brown or Black Mucus

If your mucus is brown or black, it could be a sign that you’re a smoker. The color comes from the tar and other chemicals in cigarette smoke.

If you’re a smoker and have brown or black mucus, it’s a good idea to quit smoking as soon as possible. Brown or black mucus could also be a sign of a fungal infection, so it’s important to see a doctor if you have these symptoms.

Bloody Mucus

If your mucus has streaks or pools of blood in it, it could be a sign of a more serious condition. Bloody mucus could be a sign of a sinus infection, a nasal polyp, or even cancer. If you have bloody mucus, you should see a doctor right away.

Foamy Mucus

Foamy mucus is usually a sign that you’re producing too much mucus. This could be a sign of allergies, asthma, or other respiratory conditions. If you have foamy mucus, you should see a doctor to determine the underlying cause.

Thick Mucus

If your mucus is thick and sticky, it could be a sign of dehydration. You may also notice thick mucus if you’ve been exposed to dry air for a long period of time.

To combat thick mucus, you should drink plenty of fluids and consider using a humidifier.

Conclusion

While mucus may be a nuisance, the color and consistency of your mucus can give you important clues about your health. By paying attention to the color of your mucus, you can take steps to improve your health and prevent illness.