Two-year-old baby cough recovery time depends on the original disease, most of the cough is throughout the whole process of the original disease, sometimes the cough will be slightly longer than the normal course of the original disease, but the later usually cough is lighter, you can not use special treatment, as follows: 1, the common cold: about 3-5 days can be significantly relieved; 2, acute bronchitis: about 7-10 days can be relieved; 3, coughing pneumonia: cough length To be longer, usually more than 10 days; 4, mycoplasma infection: usually longer, heavier, and easy to repeat in the short term; 5, allergic cough: if the allergic cough can not effectively cut off allergens, continue to make the baby exposure to allergens, the cough can not be well relieved, the cough recovery time is also uncertain.