Drinking water doesn’t work even if your throat is dry and sore may be due to eating spicy and irritating foods, acute pharyngitis, reflux pharyngitis, chronic pharyngitis, dry syndrome and other reasons. 1. Eating spicy and stimulating food; eating a lot of chili, garlic and other spicy and stimulating food or smoking and drinking to stimulate the mucous membrane of the throat leads to the symptoms. 2. Acute pharyngitis: viral infection of the upper respiratory tract mucosa leads to local inflammatory reaction, pharyngeal mucosal exudation, edema and other lesions, in addition to the body temperature increases evaporation and heat dissipation, resulting in a large amount of water loss, so there will be this symptom. 3. Reflux pharyngolaryngitis: after the dysfunction of lower esophageal sphincter, gastric acid and other gastric contents reflux, corrosion and irritation of the mucous membrane of the pharynx, so this symptom will appear. 4. Chronic hypertrophic pharyngitis: chronic infection of the pharyngeal mucosa for a long time and other factors lead to local mucosal hyperplasia and hypertrophy, glandular secretion decrease, so this symptom will appear. 5. Dry syndrome: autoimmune system dysfunction after autoantibodies attack salivary glands, lacrimal glands and other glands throughout the body, resulting in saliva, tears, digestive fluids and other synthetic secretion is reduced, so there will be this symptom. Drinking water doesn’t help even if you have a dry and sore throat may be related to a variety of factors, so it is recommended that you consult a doctor for a clear diagnosis.