Answer by  
                                                                                          kungfukid (1241)
                                                            
                          
                          
                                                          Thrush is a bacterial infection in the mouth caused by an overabundance of yeast. Typical causes are too much sugar in the diet. Sometimes use of inhalers can cause thrush to activate. In the best case scenario you would want to discontinue using meth and see a doctor right away to make sure there is no cause and effect.