Biology Insights

A 115/73 blood pressure reading falls in the normal range, but context matters. Learn what this number means for your heart health.

Learn what a tilt table test involves, how it detects POTS, and what your results actually mean for your diagnosis and next steps.

Got stung by a bee? Learn how to remove the stinger, ease pain and swelling, and recognize when a reaction needs medical attention.

A low red blood cell count can stem from many causes, from iron deficiency to kidney disease. Here's what it means and how doctors find the right treatment.

Crying in sleep is common at 12 months due to partial arousals, developmental leaps, and teething. Here's what's normal and when to pay closer attention.

Swollen ankles can stem from something minor or signal a serious condition. Learn what's likely causing yours and when to see a doctor.

Hydroxyzine pamoate 25 mg treats anxiety and itching, but it's also commonly used for sleep. Learn how it works, its side effects, and who should use caution.

Viral, bacterial, allergic, or irritant—each type of pink eye has distinct symptoms. Here's how to tell them apart at home.

A look at the real weight loss numbers from Mounjaro trials, how results vary by dose and person, and what happens when you stop taking it.

Some psoriatic arthritis drugs carry more risks than others. Here's how the main treatment options compare on safety, especially for infection risk.

Heart attack symptoms aren't always dramatic. Learn what they actually feel like, why women experience them differently, and what to do if you think it's happening.

Most 4-week-olds take 2–3 oz per feeding, every 2–3 hours. Learn how weight, hunger cues, and growth spurts affect how much formula your baby needs.

Meeting your protein needs on a plant-based diet is easier than you think. Here's what to eat and how to make the most of it.

Learn what physical signs, semen analysis, hormone tests, and lifestyle factors can reveal about male fertility and when to see a doctor.

Lung cancer in non-smokers is more common than many realize. Learn what causes it, who's most at risk, and steps you can take to reduce your exposure.

Most bottom eyelid bumps are styes or chalazia — harmless but annoying. Learn what's causing yours and how to treat it at home.

Waking up with a crusted eye is usually caused by pink eye, allergies, or blepharitis. Learn what's behind it and when to see a doctor.

One-sided breastfeeding can work, but it affects milk supply and breast size. Here's what to expect and when it's okay to keep doing it.

Practical ways to support someone through a manic episode, from keeping communication calm to knowing when to call for help.