ScienceInsights

Sudden full-body itching can stem from dry skin, allergies, medications, or internal conditions. Here's what's likely causing it and when to see a doctor.

Learn how Plan B affects your body, from how it works to side effects, period changes, and when to take a pregnancy test.

Two hours of REM sleep sounds reasonable, but whether it's enough depends on your total sleep and how your nights are structured.

Persistent vaginal odor is usually treatable. Learn what causes it, from bacterial vaginosis to hormones, and what actually helps.

Sildenafil typically kicks in within 30–60 minutes and lasts around 4 hours, but food, arousal, and other factors affect how well it works.

Adderall raises blood pressure for 4–6 hours with IR and up to 12 with XR. Learn how much it rises, what affects the duration, and what it means for your health.

Feeling depressed? Learn practical steps that can help, from improving sleep and diet to therapy, medication, and building a routine that supports your mental health.

Estrogen-positive breast cancer has several known risk factors, from hormone exposure and body weight to genetics and everyday chemicals.

Preparation H for eye bags is a popular beauty hack, but the formula has changed and there are real risks. Here's what actually works for puffiness.

Swollen feet or puffy hands? Learn why your body retains fluid and simple ways to reduce it, plus when it might signal something more serious.