Biology Insights

Vaping at 14 can rewire a developing brain, hook teens on nicotine fast, and cause lasting lung damage. Here's what the science actually shows.

Rear-facing car seats are safer for young children, but knowing when to switch depends on weight and height limits, not age alone.

Right side pain after sex can stem from several causes, from ovulation to ovarian cysts. Here's what might be behind it and when to see a doctor.

Ear fluid often sticks around weeks after an infection clears. Learn how long it typically lasts, why kids are more prone, and when to see a doctor.

From barrier creams to hydrocortisone, here's which creams actually help a sore bottom and when to use each one.

Right-sided rib cage pain can stem from many causes, from muscle strain to gallbladder issues. Learn what might be behind your discomfort and when to see a doctor.

Pain in your right eye when looking up can stem from eye strain, sinus pressure, or conditions like trochleitis and optic neuritis. Here's how to tell them apart.

THC from edibles can show up in urine longer than you might expect. Learn what affects detection time and what drug tests actually look for.

Bloating that lingers for days often has a clear cause. Learn what's behind it and simple steps to find relief.

Most adults should stick to 10mg of Zyrtec per day, but the right dose depends on your age, kidney health, and what your doctor recommends.

Puppies sleep a lot, but sudden tiredness can sometimes signal a health issue. Learn what's normal and when to call your vet.

Find out how much oatmeal to eat based on your health goals, plus how to choose the right oats and toppings to get the most from your morning bowl.

Learn to recognize a gum abscess by its appearance, smell, and feel — and how to tell it apart from a canker sore or other mouth issues.

At 10 weeks old, most babies need 14–17 hours of sleep per day. Here's how to recognize tired cues and what a realistic sleep day looks like.

Pink discharge can have many causes, from ovulation and birth control to early pregnancy. Learn what's normal and when to see a doctor.

From simple home remedies to medical treatments, here are the most effective ways to manage sweaty hands based on your needs.

Pooping 5 times a day isn't automatically a problem. Learn what's actually normal, what might be driving the frequency, and when it's worth seeing a doctor.

For most people with diabetes, a fasting blood sugar of 80–130 mg/dL is the general target, though your ideal range depends on your situation.

Learn to recognize heart attack and stroke symptoms, including the subtle signs that are easy to overlook, and why acting quickly makes all the difference.