If It’s Not the Flu, What Is It?

My child recently had the flu and two weeks later developed a bad case of croup. Is it the same virus lingering or is it something new?

In rare cases, men may experience flu-like symptoms such as fever, runny nose, headaches and nausea after ejaculation. The symptoms can last for weeks. It’s called post orgasmic illness syndrome, and it’s an autoimmune response in which the body...

If you or your child has a stiff neck and increased confusion, you might have meningitis, which is when the menges around the brain and the spinal cord become inflamed, usually due to an infection.

Every year thousands of people suffer from a nasty cold, and sometimes it’s even followed by a serious sinus infection. Is this just a bad cold or is it the flu?

One man says he gets a weird tingly sensation in his fingers and his feet when it’s cold outside. He says it sounds like Raynaud’s disease. He asks what it is and how to know if he has it?

Bonnie, a runner in her 40s, didn’t think twice when a mosquito bit her while she was mowing the lawn. When she started feeling sick and having headaches a few days later, she thought she had the flu, but her symptoms continued to get worse. She...