For my boyfriend) when he sneezes, his whole body hurts. any idea as to why? should he see a physician?

Yes: First of all, if he is sneezing a lot, he should be checked out for allergies or other nasal conditions. Frequent, violent sneezing can put pressure on other areas and lead to muscle strain or even hernias. If other medical conditions, such as herniated (slipped ) disks in the spine, are present, sneezing can cause severe sharp back pains that radiate down the legs.