Question

what is the real cause of sneezing during common cold

Answer 1

When we sneezing our noisy comes outside.

Answer 2

The virus which causes common cold is Haemophilus influenzae and Streptococcus pneumoneae.

When our body get infected it triggers immune responses and results in production of high levels of histamine. It makes us vulnerable to common allergens in air. Foreign particles, thus causes irritation in mucous linings of nasal chamber, causing nerve impulse to stimulate sneezing and this results in sneezing.