Pressing pain on the left side of the throat may be due to lymphadenitis or thyroiditis, etc. 1. Lymphadenitis: Diseases of the throat trigger inflammation of the lymph nodes in the neck, lymph nodes are enlarged and active, and sometimes the enlarged lymph nodes are on the left side, which can cause pain and tenderness when pressed. 2. Thyroiditis: When thyroiditis occurs, the local symptoms of the thyroid gland are obvious, and there will be pain when pressing on the throat area, both left and right sides, accompanied by difficulty swallowing, and in severe cases, breathing difficulties and hoarseness may occur. If the left side of the throat is painful when pressed for a long period of time, it is recommended to consult a doctor in time to clarify the cause of the disease and carry out appropriate treatment if necessary.