Candida refers to a group of yeast-like fungi that naturally live on the skin and within the mouth, digestive tract, and genital areas, usually without causing harm. However, when the normal balance of microorganisms is disrupted—due to factors such as antibiotics, weakened immunity, diabetes, or hormonal changes—Candida can overgrow and cause infection, known as candidiasis. Common forms include oral thrush, vaginal yeast infections, skin infections in moist areas, and, in severe cases, invasive candidiasis affecting the bloodstream or internal organs. Symptoms vary depending on the site of infection but may include itching, redness, discharge, white patches, or systemic illness in serious cases. Treatment typically involves antifungal medications and addressing underlying risk factors to restore microbial balance and prevent recurrence.