Sun Sync Guide to Black Hairy Tongue #3
Here are some more causes of black hairy tongue (lingua villosa nigra) … 5) Mouthwashes containing OXYGENATING agents can cause a black hairy tongue. Excessive use of hydrogen peroxide is a case in point. Chronic use can have other side effects besides a blackened tongue, including mouth ulcers and cancer. 6) Mouthwashes containing OXIDIZING agents…