When the weather is cold, I cough with phlegm. What should I do?

Winter is the high incidence of respiratory diseases. So I like coughing in winter. There will be phlegm when you cough. You can take some western medicine. Ambroxol hydrochloride for expectoration. Pudilan Chinese medicine can also be eaten. Hong Ju Huatan oral liquid. Pay attention to drink more water and have more rest. Wear a mask when you go out. Once you catch a cold, the system will be very sensitive. If you don't get better, go to the hospital at once. Earn more exercise and run in other seasons to enhance the cold tolerance of the respiratory system. So I won't cough in winter.