ScienceInsights

Lower back swelling can stem from muscle strain, cysts, kidney issues, or spinal conditions. Learn what's likely causing yours and when to see a doctor.

Depression has many overlapping causes, from brain chemistry and genetics to gut health, hormones, and life experiences.

Lifestyle changes like managing weight, sleep, and diet can genuinely improve sperm count. Here's what the evidence actually supports.

Vascular dementia life expectancy varies widely. Learn what typically affects survival time and how the condition tends to progress after diagnosis.

Learn how fungal skin infections develop, what they look and feel like, and how they're treated — including who's most likely to get one.

NyQuil Severe typically works for 6–8 hours, but drowsiness can linger longer. Here's what to expect from each ingredient and how to time your doses safely.

Learn how dummies work for babies, when to introduce one, how to choose the right type, and when it's time to stop using them.

An EMG test measures electrical activity in muscles and nerves to help diagnose conditions like carpal tunnel. Here's what to expect before, during, and after.

Find out how much protein kids need at every age, from toddlers to teens, plus easy food sources and what happens with too little or too much.

Robitussin is generally safe for up to 7 days, but there are important limits to know before reaching for another dose.