ScienceInsights

Lemon essential oil poses real risks for babies, from skin sensitivity to sun exposure. Here's what parents should know before using it.

Blue light glasses may help some people sleep better, but they won't protect your eyes or cure screen fatigue. Here's what the science actually shows.

Bipolar disorder isn't one-size-fits-all. Learn how Bipolar I, II, cyclothymia, and other types differ in symptoms and mood patterns.

Learn what it takes to become a certified nurse assistant, from training requirements and costs to passing the competency exam and maintaining your certification.

Learn how long alcohol stays in your blood, urine, and breath, and what factors like food, metabolism, and body weight affect how quickly it clears.

Most sinus infections clear up on their own. Learn which home remedies actually help and when it's time to see a doctor.

Diaper rash healing time depends on the cause. Learn how long irritation, yeast, and bacterial rashes typically last and when to call a doctor.

Infected wounds can take days to weeks to heal depending on severity and your health. Learn what affects recovery time and when to see a doctor.

Bug bites that linger are often caused by scratching, reinfection, or allergic reactions. Here's how to tell what's going on and how to help them heal.

Pain behind the knee can stem from several causes, including Baker's cysts, torn meniscus, or DVT. Learn what might be behind your discomfort and how it's treated.