All of the above is the correct answer
1. Infected needles
2. Insect bite
3. Organ transplant
4. Blood transfusion
You could have celiacs disease. With Celiacs's disease is a disease where your body is unable to process gluten which is found in a lot of products like pizza and ice cream.
Music has a very strange, psychological effect on people. Honestly, music is what keeps me trucking through school. But usually theres only a couple ways to get people to want to do something. One is Almost like mass hysteria, if you surround them with people who are excited to play the sport, and get them in a chant, they're going to get "pumped" to do it as well. To my knowledge, the other I wanted to cover, is music. If you've ever been on Spotify, you'll see they have "Work-out playlists." This is supposed to "hype you up" to power through the pain, just like if you wanted to relax you'd listen to classical, or orchestra music.
