When a seven-month-old baby has a dry cough, the specific treatment is as follows: First, it is common that the dry cough is formed due to cold, or after pathogenic bacterial infection. This will help the child recover and heal. If the child has a heavy cough, medication can be administered according to the pathogenic bacteria such as viruses, bacteria or mycoplasma, and nebulized inhalation can also be used to help cure the disease. Secondly, if the dry cough is caused by an allergic reaction to improper food, the environment or exposure to some substances, you can take oral desensitizing drugs, such as loratadine or desloratadine, and you can also take oral aminoglutethimide or nebulized inhalation of terbutaline or budesonide, which are beneficial to the improvement of the cough.