It is possible to have thrush after two months of HIV infection, but thrush is not necessarily caused by HIV. Thrush in HIV patients is often caused by Candida albicans infection, which occurs on the buccal mucosa, tongue and gums, and may also appear on the esophagus or trachea, and may be characterized by a localized grayish-white film with significant pain. However, thrush can also be caused by other reasons, such as long-term hormone application or immunodeficiency, due to the body’s immune function is reduced, easy to lead to Candida albicans infection, thus causing thrush. It is recommended that if thrush occurs in people with high-risk behaviors, they should go to the hospital or HIV testing center for testing and take treatment once the diagnosis is confirmed.