Sneezing all the time when you have a cold is caused by a cold virus or bacteria that invades the body through the nasal mucosa and respiratory tract. Because of the presence of viruses or bacteria in the nasal cavity, the nose becomes itchy, the mucous membrane is congested and swollen, and the mucous membrane is stimulated and sneezing occurs. In the case of nasal mucous membrane abscess, more secretions will appear. At this time, sneezing is a kind of defensive resistance reaction of the body to external infections, which is a process of eliminating secretions from the nasal cavity through sneezing. However, when the immunity is weakened and the cold is severe, there will not be sneezing all the time, but rather purulent secretions in the nasal cavity, which is a sign that the cold has worsened.