Hi thanks for contacting HCM .. According to history your mother might have mild bronchitis infection of respiratory tract .... It might be allergic or viral infection... Sputum examination and CBC will be helpful for it differentiation... Take antihistamininc drug like benadryl ... If cough troublesome mucolytic agent can be given like ambroxol cough syrup or tablet ..... Drink hot water that help in cough breakage ... Excess fried food restricted for few days as they can aggravate phlegm... Steam inhalation for two to three times a day .... If still no benefit consult physician for auscultation.... Take care