(HealthDay News) -- Hemorrhoids occur when rectal veins become swollen, itchy, painful and tender, often from straining to move the bowels.

(HealthDay News) -- Strep throat is a painful bacterial infection that's highly contagious.

WEDNESDAY, Sept. 22 (HealthDay News) -- Botulinum toxin injections may temporarily relieve drooling in children with certain neurological conditions, a new European study has found.

WEDNESDAY, Sept. 22 (HealthDay News) -- A diary can help reduce intensive care patients' risk of post-traumatic stress disorder (PTSD) after a difficult stay in the hospital, according to a new study.

WEDNESDAY, Sept. 22 (HealthDay News) -- Wearing high heels while dancing may add an air of gracefulness to a woman's moves, but heels also place a great deal of extra pressure on a dancer's toes, scientists say.

WEDNESDAY, Sept. 22 (HealthDay News) -- Extensive media coverage helps reduce the spread of pandemics, the results of a new study suggest.

TUESDAY, Sept. 21 (HealthDay News) -- Continuous treatment with imatinib (Gleevec) is recommended for patients with advanced gastrointestinal cancer, a new study suggests.

WEDNESDAY, Sept. 22 (HealthDay News) -- Pet owners need to be aware that natural foods aren't always the best choice for their pets, says a Kansas State University veterinarian.

WEDNESDAY, Sept. 22 (HealthDay News) -- People taking newer types of antipsychotic drugs, like Seroquel, may be at increased risk for developing a serious blood clot called a venous thromboembolism, British researchers say.

WEDNESDAY, Sept. 22 (HealthDay News) -- Young people with the kind of irregular heartbeat known as atrial fibrillation may be better off undergoing surgery to fix the problem instead of taking medication first, a new study suggests.

WEDNESDAY, Sept. 22 (HealthDay News) -- A blood-thinning drug could help some patients with superficial-vein thrombosis avoid more serious blood clots, a new study suggests. But experts question whether the benefit is worth the drug's high price.

WEDNESDAY, Sept. 22 (HealthDay News) -- Opponents of genetically modified salmon, as well as consumer activists and environmentalists, told a U.S. Food and Drug Administration advisory panel Tuesday that it would be irresponsible not to require labels on the fish if it is approved for humans to eat.

WEDNESDAY, Sept. 22 (HealthDay News) -- European scientists have identified genes that predispose children and adults to asthma.

WEDNESDAY, Sept. 22 (HealthDay News) -- The U.S. Food and Drug Administration on Wednesday approved the first oral drug to reduce relapses of multiple sclerosis, the nervous system disorder that has traditionally been treated with injectable drugs.

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

(HealthDay News) -- Here are the latest clinical trials, courtesy of ClinicalConnection.com:

WEDNESDAY, Sept. 22 (HealthDay News) -- Gilenya (fingolimod) has been approved by the U.S. Food and Drug Administration to reduce relapses and delay disability progression in people with relapsing forms of multiple sclerosis.

WEDNESDAY, Sept. 22 (HealthDay News) -- For patients who are too sick to withstand surgery to treat a narrowed aortic valve, a new and less invasive heart procedure might keep them alive, researchers say.

WEDNESDAY, Sept. 22 (HealthDay News) -- Routine mammograms account for only about one-third of the decline in breast cancer death rates, according to a large new analysis of data from Norway's expansive breast cancer screening program.

WEDNESDAY, Sept. 22 (HealthDay News) -- A new targeted medication for rheumatoid arthritis (RA) may benefit patients with this chronic autoimmune disease who aren't adequately helped by standard RA drug therapy, researchers say.