Whitish, Curd-Like Substances in the Tongue/Mouth
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Generally, Whitish, curd-like substances in the tongue/mouth can be related to:

• Immunodeficiency Syndrome

  This is a group of disorders affecting the immune system, reducing the body's ability to defend itself from infections and other diseases. A person can be born with such a condition (congenital) or acquire it (acquired). The severity and impact on the immune system can vary widely depending on the cause. Congenital conditions are usually due to inherited gene mutations, while acquired conditions can be caused by drugs, infections, long-term conditions and treatments, or other environmental factors.

• Primary Immunodeficiency Syndrome

  PIDDs (primary immune deficiency diseases) are rare inherited disorders that affect the immune system. People with PIDDs may be vulnerable to chronic, severe infections because their immune systems aren't functioning properly.

• Stomatitis

  Inflammation of the mouth surface causes ulcers. Various factors can cause this, such as vitamin deficiencies, medications, and autoimmunity (the body's immune system attacking itself). Often, no clear cause is found, and the ulcers heal on their own.

• Secondary Immunodeficiency Syndrome

Sometimes, Whitish, curd-like substances in the tongue/mouth may be related to these serious diseases:

• Acute HIV Infection

  Acute HIV infection occurs in some people during the first 4 weeks after contracting the HIV virus. The virus rapidly attacks immune cells and causes fever, headache, and sometimes a rash. The patient is highly contagious during this time as the viral load is high. Risk factors for transmitting HIV include unprotected sexual activity and contaminated needle stick injuries (e.g., via tattoos or sharing needles). Rarely, it is transmitted through the transfusion of blood products.