Mucus that contains bubbles and is foamy is commonly referred to as frothy sputum. Frothy sputum can sometimes be a sign of: chronic obstructive pulmonary disease (COPD) gastroesophageal reflux disease (GERD)

What does a frothy sputum indicate?

Frothy sputum is mucus that is foamy and contains bubbles. Whitish-gray and frothy mucus can be a sign of chronic obstructive pulmonary disease (COPD) and should be mentioned to the doctor, especially if this is a new symptom.

What causes white frothy spit?

Saliva that forms a white foam can be a sign of dry mouth. You might notice the foamy saliva at the corners of your mouth, as a coating on your tongue or elsewhere inside your mouth. Additionally, you may experience other symptoms of dry mouth, like a rough tongue, cracked lips or a dry, sticky or burning feeling.