The Worst Health Tips Ever

Earlier I posted about the best health tips. Now Let talked about the " The worst health tips ever" .
At best, these common suggestions are ineffective; in some cases, they may even be dangerous.

Get a healthy tan. We've all heard the expression "healthy tan," UV exposure is anything but healthy. In fact, any amount of suntanning represents skin damage on the cellular level and, over time, could result in premature aging or even cancerous tumors. Avoiding UV exposure completely during high-intensity hours, wearing protective clothing, and if you must expose your skin to the sun, using a broad-spectrum sunscreen with an SPF of at least 15.
Put butter on a burn. Not only does butter hold heat in (exactly the opposite of what you want to achieve when you have a burn); it could cause infection by exposing your body to foreign proteins. If you've suffered a burn and your skin is numb, blistering, or white, you may have the second- or third-degree type, in which case it's important to seek medical attention immediately. If your skin is red but still feels normal, chances are, you have a first-degree burn; in this case, run cold water on the affected area for about 10 minutes, then apply an over-the-counter antibiotic.
Don't read in the dark. It might not be the easiest way to read and could cause your eyes to feel tired, but there's no scientific evidence that reading in dim light can damage your vision. The same rule applies to other vision-related myths, such as sitting too close to the TV and looking at the computer for too long. As experts explain, there are very few ways in which overuse can hurt your eyesight. One notable exception is staring at the sun, which can cause serious damage to your cornea, lens, and retina.
Stop pulling out gray hairs. Contrary to popular belief, pulling out one gray hair won't cause two more to grow in its place. Instead, the original strand will simply be replaced by a single gray hair, so pulling them out won't speed (or slow) the process. Along these lines, a shocking event can't cause you to go gray overnight-or any more quickly than you naturally would.
Feed a cold, starve a fever. This old adage doesn't hold much scientific weight. Although it's always important to get your nutrients, feeding yourself won't make a virus run its course faster, and starving yourself is never a good idea, especially when you're sick. If you have a cold or a fever, the best plan of action is to rest, drink plenty of fluids, and if your symptoms don't improve, seek medical attention.