ScienceInsights

A high pulse can have simple causes like stress or caffeine, but sometimes it signals something worth checking. Here's how to know the difference.

Most girls get their first period between ages 9 and 16. Learn what triggers it, what body changes come first, and when to talk to a doctor.

Sharp stomach pain can mean many things, from trapped gas to kidney stones. Learn what the location and pattern of your pain might tell you about the cause.

Gassy but can't go? Learn why slow digestion, diet, gut bacteria, and other factors can cause excess gas without a bowel movement—and what to do about it.

From first exposure to full recovery, here's what to expect with the new COVID strain, including symptom duration, contagious periods, and long COVID.

Taking too much Benadryl can quickly shift from drowsiness to serious symptoms. Here's what happens in your body and when it becomes dangerous.

Sneezing and sniffling? Learn how cold symptoms compare to flu, COVID, and allergies—plus what your mucus color and timeline can tell you.

Learn the safe daily Advil limits for adults and kids, how long you can take it, and risks like kidney damage and stomach bleeding to watch for.

Tight hips and lower back pain often go hand in hand. Learn which stretches and exercises actually help, and how long relief typically takes.

A psychological complex is a pattern of feelings and beliefs that quietly shapes your behavior. Here's what that actually means and how it develops.