Why do i sneeze after i cough ?

Rhino sinusitis : You could be having sinusitis with post nasal drip that causes cough and rhinitis causing sneezing. Are you allergic to dust, cat, dog, pollen. Regular neti pot can help wash off allergen. Otc Claritin or zyrtec can help. Reflux can cause dry cough that can take months to get better, a lot of dietaryodification and life style changes are required to control reflux.