Sun Sync Guide to Black Hairy Tongue #4
There are multiple causes of black hairy tongue (lingua villosa nigra) … poor oral hygiene / dry mouth / mouth breathing / general debilitation / oxygenating or oxidizing mouthwash / soft, non-abrasive food / fasting / tobacco chewing or smoking / betel chewing / drug abuse (alcohol, crack cocaine, heroin) / fever / chemotherapy /…