Oral thrush normally presents as thick white patches that resemble cottage cheese in the mouth or on the tongue, according to Mayo Clinic. Thrush can also occur in other areas, including under the breasts, on the nipples or on the genital region. An overgrowth of the candida fungus is the root cause of thrush.
Thrush is common in nursing mothers and their infants, and it is highly transmittable through the nursing relationship. Thrush can be diagnosed by a health care practitioner and is easily treatable in most cases, according to WebMD. Depending on the severity of the thrush, a doctor may prescribe oral antifungals. Over-the-counter and home remedies are also available.