Trusted Health Articles

Bronchitis

A lingering cough after a cold is often acute bronchitis — usually viral, not needing antibiotics, but sometimes confused with pneumonia when symptoms are severe.

Ear Infection

Ear infections are especially common in young children and usually improve within a few days — here's what causes them and when antibiotics or a doctor's visit are actually needed.

Sinusitis

Facial pressure, thick nasal discharge, and a cold that won't quit are the hallmarks of sinusitis — here's how to tell it apart from a lingering cold and what actually helps.

Tonsillitis

Tonsillitis causes a sore throat plus visibly swollen, often white-coated tonsils — usually viral, but frequent recurrence can raise the question of removing the tonsils altogether.

Common Cold

The common cold is the most frequent human illness, usually mild and self-limited — here's what to expect, how to feel better faster, and when it might be something more.

Influenza (Flu)

The flu comes on faster and hits harder than a common cold, and can be genuinely dangerous for some groups — here's how to recognize it, treat it, and know when it needs medical attention.

Fast Heart Rate: Causes, Symptoms, and When to Seek Medical Care

A racing heart is often a normal reaction to exercise, stress, or caffeine — but persistent or unexplained tachycardia can point to an underlying condition worth checking.

Shortness of Breath: Causes

Shortness of breath ranges from an expected response to exertion to a sign of a serious heart or lung condition — here's how the causes differ and when it's an emergency.

Causes of Heart Palpitations

That fluttering, pounding, or skipped-beat feeling is usually harmless and tied to everyday triggers — but a few accompanying signs mean it's worth getting checked.

Chest Pain: Causes, Symptoms, Warning Signs, and When to Seek Help

Chest pain has many possible causes ranging from harmless to life-threatening. Here's how to think about different patterns — breathing, eating, moving — and the red-flag features that mean it's time for emergency help.

Heart Attack Symptoms: Warning Signs, What to Do, and When to Call Emergency

A suspected heart attack is an emergency. Learn the warning signs, including the less obvious ones, and what to do while you wait for help.

Symptoms of High Cholesterol

High cholesterol is almost always symptomless — which is exactly why testing, not how you feel, is how it's found. Here's what rare visible signs can look like.

How to Lower Cholesterol

Diet and lifestyle changes can meaningfully improve cholesterol levels — here's what has the strongest evidence behind it.

Triglycerides: Normal Range and Causes of High Levels

Triglycerides are a different type of blood fat from cholesterol, but they're checked together — here's what a normal level looks like and what raises it.

HDL Cholesterol: Normal Levels, Low and High HDL, and What Your Results Mean

HDL is often called "good" cholesterol, but it's not as simple as "the higher, the better" — here's what a normal level actually means.

LDL Cholesterol: Normal Range

LDL cholesterol is the type most directly linked to artery plaque buildup — here's what counts as a healthy level and why targets vary by individual risk.

Normal Cholesterol Levels: LDL, HDL, Total Cholesterol, and Triglycerides

A lipid panel reports several numbers at once — see the general reference ranges for total cholesterol, LDL, HDL, and triglycerides, and why your personal target can differ.

Cholesterol: Normal Ranges, LDL, HDL, Triglycerides, and When to See a Doctor

Cholesterol isn't one number. Here are the normal ranges for LDL, HDL, triglycerides and non-HDL, what high or low results actually mean, and when it's worth talking to a doctor.

Vitamin D Toxicity: Can You Take Too Much?

Vitamin D toxicity is rare but real, almost always caused by long-term high-dose supplementation rather than sun or food — here's what to know.

Vitamin D and Calcium: How They Work Together for Bone Health

Vitamin D and calcium work as a team for bone health — without enough vitamin D, the body can't use calcium effectively, no matter how much you consume.