TUESDAY, June 15 (HealthDay News) -- Sleep problems, irritability, concentration problems, jumpiness and feeling constantly "on guard" are among the hyperarousal symptoms of post-traumatic stress disorder (PTSD) associated with anger and hostility in U.S. soldiers returning from Iraq and Afghanistan, researchers say.

TUESDAY, June 15 (HealthDay News) -- CT angiography might not be necessary in many patients suspected of having a blood clot in the lung (pulmonary embolism), and a risk analysis can identify those most likely to require the procedure, a new study suggests.

(HealthDay News) -- Your physical and emotional health can play a big part in the severity of your arthritis pain.

(HealthDay News) -- As with any exercise equipment or sporting gear, a bicycle should fit a rider properly, especially if the user is a child.

TUESDAY, June 15 (HealthDay News) -- The brain's wiring isn't fixed in early life, and circuits in the adult brain are continually modified by experience, suggests a new study involving mice.

TUESDAY, June 15 (HealthDay News) -- The hemoglobin A1C test is supposed to give doctors a sense of diabetics' long-term blood sugar levels, but new research suggests the test may have different results depending on race, even if daily blood sugar levels are the same.

TUESDAY, June 15 (HealthDay News) -- A severe and potentially deadly digestive tract disorder in infants may have a genetic component, finds a new study from Denmark.

TUESDAY, June 15 (HealthDay News) -- Cystic fibrosis patients with methicillin-resistant staphylococcus aureus (MRSA) in their respiratory tract have worse survival rates than those without the drug-resistant bacteria, researchers have found.

TUESDAY, June 15 (HealthDay News) -- In a effort to improve the methods for early detection of HIV, researchers sought to determine if a program using "nucleic acid testing" (NAT) would increase the number of cases that could be detected early, and found that it did so by 23 percent.

MONDAY, June 14 (HealthDay News) -- A drug commonly used to prevent excess bleeding in surgeries could keep thousands of people from bleeding to death after trauma, a new study suggests.

TUESDAY, June 15 (HealthDay News) -- Moderate doses of calcium and vitamin D supplements don't raise women's coronary artery calcium (CAC) levels, a new study finds.

TUESDAY, June 15 (HealthDay News) -- Eating a Mediterranean-style diet might improve an important measure of heart function, a new study of twins shows.

TUESDAY, June 15 (HealthDay News) -- While some recent research has documented an upswing in mastectomy rates among women who have been diagnosed with breast cancer, a new study comes to a different conclusion.

TUESDAY, June 15 (HealthDay News) -- When it comes to stress, women are twice as likely as men to develop stress-induced disease, such as depression and/or post-traumatic stress, and now a new study in rats could help researchers understand why.

TUESDAY, June 15 (HealthDay News) -- Low-dose steroid pills seem to work as well as high doses of injected steroids for patients hospitalized with severe chronic obstructive pulmonary disease (COPD), researchers report.

TUESDAY, June 15 (HealthDay News) -- A new study shows that people with high levels of a B vitamin are half as likely as others to develop lung cancer. But while the reduction in risk is significant, this doesn't mean that smokers should hit the vitamin aisle instead of quitting.

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

TUESDAY, June 15 (HealthDay News) -- Obesity is tied to reduced sexual activity and poorer sexual health, according to new research from France.