For those with pain on the edge of the tongue, if the edges of the tongue are red and swollen and painful on both sides of the tongue, there is fire in the liver and gallbladder; if the tip of the tongue is painful on the edge of the tongue, there is fire in the heart. The exact cause should be decided in conjunction with the patient’s other symptoms. According to Chinese medicine, the five organs of the tongue are the tip of the tongue for the heart, the sides of the tongue for the liver and gallbladder, the middle of the tongue for the spleen and stomach, and the root of the tongue for the kidney. If the edges of the tongue are red, swollen and painful, accompanied by fever, irritability, pain in the ribs, head swelling and pain, redness and swelling of the eyes, etc., the liver and gallbladder are on fire; if the tip of the tongue is red, accompanied by heartburn, insomnia and dreaming, sores on the tip of the tongue, and short and red urination (urine is small in volume and dark yellow in color), etc., it is mostly due to the heart’s exuberant fire. If the symptoms of tongue edge pain are not relieved for a long time or accompanied by other discomforts, it is recommended to consult a doctor in time.