ScienceInsights

Red spots on your arms could be keratosis pilaris, eczema, or something else entirely. Learn what's causing yours and how to treat it effectively.

Lexapro works in your brain from day one, but lasting antidepressant effects require weeks of receptor and structural changes to take hold.

At one month old, waking every 2–3 hours is completely normal. Here's what to expect at night and when longer sleep stretches typically begin.

Stomach pain from azithromycin usually fades within a few days. Here's why it happens, how to ease it, and when to call your doctor.

Internal styes hurt, but warm compresses can help most heal at home. Learn what works, what to avoid, and when to see a doctor.

Ovulating during your period is unlikely but possible, especially with short cycles. Here's what that means for fertility and pregnancy risk.

14% body fat sits in a healthy, athletic range for most men, but age and measurement accuracy matter more than the number alone.

Taking Adderall XR too late in the day can seriously disrupt your sleep. Here's how to find a cutoff time that works for your body.

Learn how to tell if you're in ketosis through physical signs and three testing methods, plus how to read your results accurately.

Practical home remedies for gum infections, from saltwater rinses to clove oil, plus when it's time to see a dentist.