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Cold & Flu
Cold and Flu Symptoms
Did you experience a sudden or gradual onset of symptoms? Fever? Body aches? Learn more about how to tell the difference between the common cold and flu.
What Is Lethargy?
Medically reviewed by Ana Maria Kausel, MD
What Are Boogers Made Of?
Medically reviewed by Chris Vincent, MD
What Is Mucus? Purpose, Causes, and Treatment
Medically reviewed by Elizabeth Molina Ortiz, MD, MPH
Low-Grade Fever: Definition, Causes, Treatments
Medically reviewed by Kashif J. Piracha, MD
What Is Normal Body Temperature? Range, Measurement, More
Medically reviewed by Jason DelCollo, DO
Common Cold: Signs, Symptoms, and Complications
Medically reviewed by Michael Menna, DO
How Colds and the Flu Are Diagnosed
Medically reviewed by Sanja Jelic, MD
Body Aches That Come With the Flu
Medically reviewed by Andy Miller, MD
Breath Sounds: Abnormal Lung Sounds and Causes
Medically reviewed by Michael Menna, DO
Why Do Colds Cause Headaches?
Medically reviewed by Sanja Jelic, MD
Sinus Congestion: Overview and More
Medically reviewed by Benjamin F. Asher, MD
Nausea and Vomiting: When to See Your Doctor
Medically reviewed by Sanja Jelic, MD
Is It Normal to Feel Neck Pain With a Cold?
Medically reviewed by Sanja Jelic, MD
Influenza (the Flu): Signs, Symptoms, and Complications
Medically reviewed by Michael Menna, DO
How the Flu Is Diagnosed
Medically reviewed by Michael Menna, DO
Can I Have Sex When I'm Sick?
Medically reviewed by Michael Menna, DO
Fevers: Symptoms, Causes, Diagnosis, and Treatment
Medically reviewed by Michael Menna, DO
When Is a Fever Too High?
Medically reviewed by Michael Menna, DO
Why Do Fevers Cause Chills?
Medically reviewed by Michael Menna, DO
What Does It Mean When I Have Green or Yellow Mucus?
Medically reviewed by Jason DelCollo, DO
Fever: Causes and Concerns
Medically reviewed by Jason DelCollo, DO
How Fever Is Treated
Medically reviewed by Jason DelCollo, DO
5 Things to Do When You Are Sick
Medically reviewed by Michael Menna, DO
Nasal Congestion From Colds: Cause, Symptoms, Treatment
Medically reviewed by Jason DelCollo, DO
8 Reasons You Have a Runny Nose
Medically reviewed by Jenny Sweigard, MD
Why You Might Lose Weight When You're Sick
Medically reviewed by Chris Vincent, MD
Difficulty Breathing and Intercostal Retracting
Medically reviewed by Michael Menna, DO
Wheezing as a Sign of Respiratory Distress
Medically reviewed by Jason DelCollo, DO
Is Your Cold Causing a Wet or Dry Cough?
Medically reviewed by Jason DelCollo, DO
Examining How the Flu Progresses Day After Day
Medically reviewed by Michael Menna, DO
Is Your Toothache a Sign of Sinusitis?
Medically reviewed by Sumaya Ibraheem, DDS
Recognizing Early Flu Symptoms in Children
Medically reviewed by Sarah Rahal, MD