There are different rehab centers for different problems such as drug rehabs to help those with a drug problem, alcohol rehab for those who have alcohol problems, addictions rehab for those who have addictions with a specific issue or habit. How do you know if rehab can help you? The first step to recovery is to admit to yourself that you have a problem. How do you know if you have a problem? If you look at the info about certain problems on the internet, they can give you a guideline of how it effects the person when they do have a problem.