1 Heart-related lung problems. 2  Chest X-rays can show changes or problems in your lungs that stem from heart problems. 3  For instance, fluid in your lungs (pulmonary edema) can be a result of congestive heart failure.
A new report suggests that itâs generally safe for the average person to consume 400 milligrams of caffeine each a day. More than 90 percent of the worldâs population consumes caffeine in some form on a regular basis. The stimulant drug (yes, it is considered a drug) helps a person stay awake, alert and productive.
How much caffeine should I have? If you are having trouble sleeping, you should try to limit the amount of caffeine that you have. It is best to have no more than 200mg per day. You should not have any for at least 4 hours prior to bedtime. Many people will find that their sleep improves with just this change. But you should also keep in mind that caffeine is addictive. This means that if you stop suddenly, you may suffer from headaches, tiredness and anxiety.