Trusted Health Articles

Dizziness

'Dizziness' actually covers several distinct sensations with very different causes — describing exactly what you feel is often the key to figuring out why.

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.

How to Lower Blood Pressure: Lifestyle Changes That Actually Help

Several lifestyle changes have strong, well-established effects on blood pressure — here's what the evidence supports, with specific, actionable targets.

Sudden High Blood Pressure: Causes, What to Do, and Emergency Signs

A sudden, very high reading calls for calm, prompt action. Learn the 180/120 threshold, when it is an emergency, and what to do next.

Symptoms of Low Blood Pressure

Unlike high blood pressure, low blood pressure often causes noticeable symptoms — here's what to watch for, and the signs of a serious drop.

Causes of Low Blood Pressure

Low blood pressure can be a normal individual trait, or it can result from dehydration, medications, or an underlying condition — here's how to tell the difference.

Low Blood Pressure

Unlike high blood pressure, low blood pressure often causes noticeable symptoms — here's when it's a normal variation and when it needs attention.

Normal Blood Pressure by Age

Blood pressure categories are largely the same across adulthood, though typical readings tend to shift somewhat with age — here's how to read a blood pressure result.

Causes of High Blood Pressure

Most high blood pressure has no single identifiable cause, but a smaller number of cases stem from an underlying, treatable condition — here's the difference.