The common cold or viral rhinitis is a mild, self-limiting infection of the upper respiratory tract Cortisol levels drop during the night worsening the cold symptoms ... at the back of the throat.

The flu can also cause a general feeling of fatigue or malaise, Ray says, as well as gastrointestinal issues like diarrhea ...

“Generally, with the flu, the symptoms usually come on really suddenly,” said Dr. Sindhu Aderson, an immediate care physician ...

MORE:Get an online treatment plan for your cold, flu ... a doctor if you have severe symptoms or if your symptoms last longer than 10 days or keep coming back. Because the cause of your sinus ...

Along with flu, winter months are highs for the common cold, RSV and COVID-19. Here's what to know about flu symptoms in 2025, how to tell if it's something else, and how to protect yourself ...

Iron deficiency can cause several symptoms, including fatigue, headaches, and brittle nails. Spotting these signs early on ...

It's officially cold and flu ... that when my body is run down and potentially "coming down" with something, i.e., fighting off an infection or illness, the skin on my back will get extra sensitive.

There's still no cure for the common cold. Cold medicines seek to relieve symptoms rather than cure ... though there's little research to back this up. Humidifiers. Humidifiers add moisture ...

COVID-19 symptoms can appear later than cold or flu symptoms, USA TODAY reported. It's also more commonly associated with a dry cough, while the flu typically causes a productive cough that brings ...