Because stress pumps large amounts of adrenalin, a hormone, into the body, the immune system is overstimulated and reacts by triggering flare ups of the disease.
If you feel nauseated, dizzy, or overstimulated, find the coolest area of the studio and sit in Hero Pose.
Infants cry because they are hungry, uncomfortable, in pain, overstimulated, tired, or just bored.