hi welcome to HCM -hi i had gone through your query and understand your concerns. i would come up with the possibility of ALLERGY is the underlying cause for the development of her complaints and leads to BRONCHITIS and PHARYNGITIS to her treatment is directed to the underlying cause of allergy. -avoid exposure to cold weather -avoid taking sweets,cold drinks,fruits contain water like tomatos,lemon,grapes etc -avoid milk i advise you taking Homeopathic medicines gives safe and permanent cure for her allergic complaints consult your local homeopathic physician for correct diagnosis of the case and remedy to fit her complaints I hope this is helpful for you, thank you