Throat ulcers can be seen in acute pharyngitis, herpetic pharyngitis, acute tonsillitis, etc. They may present with symptoms such as sore throat, dysphagia, bad breath, etc., and may be accompanied by systemic symptoms, redness and swelling of tonsils. 1. Acute pharyngitis: there may be pain in the local mucous membrane of the throat, which is more intense and often combined with dysphagia, and there may also be symptoms such as bad breath. 2. Herpetic pharyngitis: most of the throat ulcers occur in spring and fall season alternation, due to viral infections and other diseases such as herpetic pharyngitis, the onset of the disease is acute, can lead to fever, but the body temperature is usually not more than 38.5 ℃, can be accompanied by headache, body discomfort, joint pain and other symptoms. 3. Acute tonsillitis: tonsils can be red and swollen, the surface can have grayish-white, carrion-like pseudomembrane, taste smelly, and easy to tear off, the membrane below the ulcers, you can see small bleeding spots. It is recommended that patients seek timely medical care, clear diagnosis, active treatment of the disease, to avoid aggravation of the condition.