THURSDAY, May 23 (HealthDay News) -- Symptoms of borderline personality disorder often mimic traits of other psychiatric disorders, complicating diagnosis and treatment. But researchers in Canada say they have identified a characteristic that may be unique to borderline personality disorder: a tendency to misinterpret emotions expressed by the face.

THURSDAY, May 23 (HealthDay News) -- The sensation of itching is hardwired into the nervous system and can be traced back to a small molecule released in the spinal cord, according to a new study in mice.

THURSDAY, May 23 (HealthDay News) -- Statins are proven drugs taken by millions to lower their cholesterol, but the medications also could hamper heart patients' ability to improve their cardiovascular health through exercise, researchers say.

THURSDAY, May 23 (HealthDay News) -- Mild to moderate iodine deficiency during pregnancy may have a negative long-term impact on children's brain development, British researchers report.

WEDNESDAY, May 22 (HealthDay News) -- Migraines and depression can each cause a great deal of suffering, but new research indicates the combination of the two may be linked to something else entirely -- a smaller brain.

WEDNESDAY, May 22 (HealthDay News) -- Fish oil supplements could help reduce the risk for type 2 diabetes, new research suggests.

WEDNESDAY, May 22 (HealthDay News) -- People with heart failure are more likely to experience poorer health from having a thyroid gland that is even mildly underactive, according to a new study.

WEDNESDAY, May 22 (HealthDay News) -- Over the next two decades, the cost of treating strokes in the United States is expected to more than double, topping more than $180 billion a year, according to new research.

TUESDAY, May 21 (HealthDay News) -- Aggressive treatment for prostate cancer may not be warranted for many older patients with underlying medical conditions, a new study finds.

TUESDAY, May 21 (HealthDay News) -- Use of the antidepressant Lexapro appears to help prevent a potentially serious stress-related heart condition, a new study finds.