My butt cheek is swollen? Help?

I'd imagine it has to do with you being overweight. Being overweight is harder on your body than it would be if you were an alcoholic and heavy smoker. Being overweight will destroy your body, causing early death. Some overweight people die as young as 25 - 30 years old because it is so hard on your body. All of your organs are squished inside you and wrapped in a dense layer of adipose (fat). Your body has to work hundreds of times harder just to do everyday activities that a normal persons body wouldn't even find hard. You should not wory about your sciatica anymore as it is cureable. You need to get off the couch, eat right and exercise. Getting a good pair of insoles will help. Spend some money on good shoes and then hit the gym. After you have lost a bunch of weight you might be comfortable enough to swim in a public pool. If I were you i'd swim 5 days a week for atleast an hour. No more junk food and no more soda pop, coffee or alcohol. Just water, clean protien and very little carbs. It is your life and your body - take care of it.