You’ve been sending me some really interesting questions recently, so I decided to do another episode of Responding to Comments to get to the bottom of some medical mysteries. Today I talk about how often you should shower and wash your hair, why we kick when we sleep, what causes an itch, why we administer vaccines in the shoulder, ringing ears, runny noses from spicy food and hot wings, posture correctors, electrolytes, stomach growling, and the truth of getting 10,000 steps a day. Drop a comment down below if there’s a medical question you’d like me to answer!