White pus spots in the throat are usually caused by acute infections in the throat, which may be caused by acute tonsillitis, acute pharyngitis, acute epiglottitis and so on. 1. Acute tonsillitis: Due to bacterial infection, the tonsils become congested and enlarged, and purulent secretions overflow from the crypts of the tonsils, forming white pus spots, thus leading to white pus spots in the throat. 2. Acute pharyngitis: the throat is inflamed due to viral or bacterial infection of the pharynx, and there can be purulent secretions after the glands in the back wall of the pharynx are clogged and infected, resulting in white pus spots in the throat. 3. Acute epiglottitis: acute epiglottitis occurs due to bacterial infection, and as the disease develops, an epiglottic abscess may form. It can be manifested as congestion and swelling of the epiglottis, which is spherical in shape, and there can be yellowish-white pus spots on the surface of the red and swollen mucosa. When there are signs of white pus spots in the throat, it is important to go to the hospital for examination and diagnosis.