What causes froth coming from mouth?
Patient: Hi My four years old girl suffers allergies occasionally including skin and nasal allergies . Nowadays she has allergy on her face and is on Zyrtec and Avil . I have just noticed that while sleeping she had froth coming out from her lips.. I saw it earlier as well about six months ago but then I thought it is bacause of possibility of pin worms and I got her de wormed. Does this foam / saliva thing has to do anything with allergy or it is something else?? Doctor: Yes its related to allergy. She is suffering from allergic rhinitis which is causing her nasal obstruction particularly at night. As her nose is getting blocked she is compelled to breath through mouth cauing the frothing. Use Otrivin mini nasal drop before sleep at night. These will relieve the symptoms. You can also try Duonase nasal spray as second option.