Electronic cigarettes, or e-cigs, may be increasing in popularity among teens. And teens may not have much trouble buying e-cigs online, despite being underage.

A short-term effect of concussions could be used as an important tool for doctors diagnosing and treating this brain injury.

Controversy swirls around whether ADHD is over- or underdiagnosed — bringing into question the real rate of ADHD. New evidence sheds light on the factors that may affect reported rates of ADHD.

Economic and job-related crises affect many people during their lives. For some adults, these crises may lead to self-harm. Fortunately, help is available for those who are at risk.

ADHD is known to be tied to difficulties in school and trouble focusing, but something much more serious might also be tied to the condition.

If you need another reason to quit smoking, keep reading. New evidence supports past findings that smokers face a raised risk for many health problems.

The number of people in the US who smoke is on the decline, and those who do smoke may be doing so for shorter periods of time. Changed smoking patterns, however, may be causing some patients at risk for lung cancer to miss out on cancer screening.

Good times with friends sometimes involve a little drinking, but social media may be sending the wrong message about drinking too much.

Quitting cold turkey works for some smokers, but others struggle with stopping all at once. It's not easy for most smokers, but there's a medication that might help some ease into quitting.

A bad night of sleep once in a while is no big deal, but it can turn into a serious health issue for some. Many treatments — even some that don't require medication — may help patients with these sleep problems.