Boredom is the key emotion behind most teens’ use of Instagram, a new study says. Teens open the app because they’re bored, then sift through its contents looking for interesting bits to relieve their boredom, researchers report. Then, bored by slogging through the site’s “content soup,” the teens log off, researchers found. “We saw teens…  read on >  read on >

Defiance, tantrums, aggression: All signs of a condition called conduct disorder, which Mental Health America says affects up to 16% of boys and 9% of girls. Now, research is revealing real differences in the brain structure of children and youths with conduct disorder, compared to those without the condition. Specifically, the study of the brains…  read on >  read on >

An experimental blood test could help detect pregnant women at increased risk for preeclampsia, a serious high blood pressure condition that can harm both mother and child. Researchers report the test looks at genetic markers found in tiny particles called extracellular vesicles that transfer information between human cells. Women with preeclampsia followed a specific pattern…  read on >  read on >

Many tweens and teens are filling prescriptions for opioids far in advance of surgeries unlikely to be associated with severe pain afterward, a new study says. Worse, a significant minority continue to fill those opioid prescriptions three to six months after surgery, a sign of possible addiction, researchers found. “Our study found that these patients…  read on >  read on >