My son was coughing for more than 2 weeks in January, but no fever, no running nose. Mostly at night. We didn't see a doctor, YuYanSang "Hau Jo San" didn't work that time. Wai Yuen Tong Chinese doctor suggested to use 川貝+鴨咀梨(no skin and seeds)+冇糖無花果 焞. After 3-4 days, no coughing at all.