An infection occurs when a microorganism — such as bacteria, fungi, or a virus — enters a person’s body and begins multiplying. Infections can have a variety of effects, ranging from mild to severe.

Vaginal yeast infections (candidiasis) are common. Over-the-counter treatment options may alleviate your symptoms within a few days. In severe cases, prescription medication may be necessary to clear ...

The most common symptom of a pinworm infection is intense itching around the anus. Infections are contagious but are preventable with handwashing and other hygiene practices. A pinworm, or Enterobius ...