Oral candidiasis commonly known as oral thrush is a fungal infection that develops inside the mouth, tongue or throat due to an overgrowth of yeast. There are thousands of microorganisms that live inside our mouths, normally our immune system will use the good microorganisms to keep the bad microorganisms such as candida albicans under control. However, when the balance is disrupted candida albicans fungus begins to grow uncontrollably causing an infection known as oral thrush to develop inside the mouth. Oral thrush can occur when the immune system is weakened, this can be a result of some medications, such as steroids, cancer treatments and antibiotics. These medications can disturb the balance of microbes that would naturally prevent infection. People who suffer from diseases and illnesses that affect the immune system such as HIV/AIDS, diabetes and leukemia tend to be more susceptible to getting oral thrush. The symptoms of thrush include creamy white spots inside the mouth, inner checks or on the tongue, a sore throat, difficulty swallowing, dry or cracked skin at the corners of the mouth and a bad taste in the mouth. Oral thrush is usually treated with antifungal medication and once treatment begins; it usually goes away within a couple weeks. The condition can be problematic for those who have weakened immune systems and they may require stronger medications to treat the infection.