Color:

* Clear/White: Healthy

* Yellow/Green: Infection

* Brown/Black: Blood (see a doctor)

Consistency:

* Thin and Watery: Healthy

* Thick and Sticky: Infection

* Curds or Chunks: Infection

Amount:

* Small Amount: Healthy

* Excessive Amount: Infection or Allergic Reaction

Smell:

* Mild, Sweet Smell: Healthy

* Sour or Foul Smell: Infection

Other Symptoms:

* Fever

* Cough

* Sore Throat

* Sinus Congestion

* Headache

* Fatigue

If you experience any concerning symptoms, it's a good idea to see a doctor for further evaluation.