What is disease and what are the symptoms?

Disease is a condition in which the body is not functioning properly. It can be caused by a variety of factors, including:

* Infectious agents, such as bacteria, viruses, and fungi

* Genetic defects

* Environmental factors, such as exposure to toxins or radiation

* Lifestyle choices, such as smoking, drinking alcohol, and eating an unhealthy diet

Symptoms are the signs of disease that a person may experience. They can include:

* Fever

* Cough

* Sneezing

* Diarrhea

* Vomiting

* Pain

* Swelling

* Redness

* Itching

* Fatigue

* Weight loss

Some diseases are mild and may only cause a few symptoms. Others can be serious and even life-threatening. It is important to see a doctor if you are experiencing any symptoms of disease.

Here are some common symptoms of specific diseases:

* Cold: Runny nose, sneezing, sore throat, cough, headache, and fatigue

* Flu: Fever, chills, muscle aches, headache, and fatigue

* Strep throat: Sore throat, fever, difficulty swallowing, and swollen lymph nodes

* Pneumonia: Fever, chills, cough, shortness of breath, and chest pain

* Bronchitis: Cough, chest pain, shortness of breath, and wheezing

* Sinusitis: Headache, facial pain, nasal congestion, and thick nasal discharge

* Ear infection: Ear pain, fever, headache, and hearing loss

* Urinary tract infection: Painful urination, frequent urination, and cloudy urine

* Skin infection: Redness, swelling, itching, and pus

* Gastroenteritis: Diarrhea, vomiting, abdominal pain, and fever

If you are experiencing any of these symptoms, it is important to see a doctor to get diagnosed and treated.