Sore throat and body weakness may be caused by acute pharyngitis, acute tonsillitis, upper respiratory tract infection and other factors. 1. Acute pharyngitis: If the pharynx is infected by bacteria, viruses and other pathogenic bacteria, acute inflammation may be triggered, resulting in symptoms such as swelling and pain in the throat, soreness in the limbs, general discomfort, etc., which can lead to increased pain in the throat when swallowing. 2. Acute tonsillitis: If the tonsils are infected by pathogenic bacteria such as beta-hemolytic streptococcus and staphylococcus, it may lead to symptoms such as redness and swelling of tonsils, pain, fever, malaise and loss of appetite. 3. Upper respiratory tract infection: If viral or bacterial infection occurs in the upper respiratory tract, it may lead to fever, nasal congestion, runny nose, sore throat, cough, fatigue, loss of appetite and other symptoms. The appearance of sore throat body fatigue, should be timely consultation, clear cause, targeted treatment, so as not to delay the condition.