👉 A pharyngolith is a soft, white mass that can be found in the throat of an adult. It's usually harmless and doesn't cause any problems. However, if it gets too big or hurts, you might need to see a doctor for advice. The exact cause of a pharyngolith isn't fully understood, but some people have them because of stress or infections, while others are caused by certain medical conditions like allergies or autoimmune disorders.