How Long Are You Contagious With a Cold: Timeline
Most people with a cold are contagious for about 1–2 days before symptoms and up to a week after. Here's what the science says about timing.
How to Keep Your Armpits from Sweating All Day
Practical tips to reduce underarm sweating, from nighttime antiperspirant application to medical treatments for excessive sweating.
How to Treat PTSD After a Car Accident: Therapies That Work
Car accident PTSD is treatable. Learn how therapies like CBT, EMDR, and medication can help you recover and feel safe again.
What to Take to Increase Blood Flow Naturally
From beetroot juice to magnesium, here's what the science says about supplements that can naturally support healthy blood flow.
How Much Is a Serving of Caffeine by Drink Type?
Caffeine amounts vary widely by drink type and serving size. Here's what coffee, tea, soda, and energy drinks actually contain per cup or can.
What Is the MCL in Your Knee? Function and Injuries
The MCL stabilizes the inner side of your knee. Learn how it gets injured, how tears are graded, and what recovery typically involves.
What to Do for Kidney Pain at Home and When to See a Doctor
Learn how to recognize kidney pain, what you can safely do at home, and which symptoms mean it's time to call a doctor right away.
What If My Period Blood Is Black: Should I Worry?
Black period blood is often just older blood that took longer to leave the body, but sometimes it can signal a condition worth checking out.
What Days Feel Worst With COVID? A Day-by-Day Look
COVID symptoms tend to peak around days 3–5, with the middle days feeling the worst. Here's what to expect and when to keep a closer eye on how you feel.
At What Point Is Blood Pressure Dangerously High?
Learn which blood pressure numbers are cause for concern, when a reading becomes a medical emergency, and what a single high reading actually tells you.