Does your friend have GERD? It could be causing it.
Also my brother sneezes every morning when he looks at the morning sun. We say he's allergic to sunshine. ;D
There is a documented condition in which someone sneezes when stimulated by light. So, strange as it sounds, it can happen!
Ulcerative colitis forum co-moderator
Moderate to severe left-sided UC diagnosed 2001. Flared for 5 years, finally in remission with Remicade since March 2006. Colazal, Remicade, Nature's Way Primadophilus Reuteri.
Avascular necrosis in both shoulders is my "forever" gift from steroids.
Chronic joint/connective tissue/muscle pain; TKR 05/09
"My life is an ongoing medical adventure"