The red blood in the coronal groove of the glans may be caused by inflammation stimulating the local skin mucosa of the glans, and the patient may be accompanied by itching, pain and other symptoms. Glans is an inflammation of the glans caused by infection, trauma, irritation and other factors of the penile head or penile foreskin. Its etiology is also related to predisposing factors such as long foreskin, poor personal hygiene habits, frequent washing, low immunity, and sexual impurity. As the local skin of the glans is stimulated by inflammation, erythema, edema and other symptoms can appear, manifested as red blood in the coronal groove. Some patients may also experience local itching sensation, pain, pressure and pain, and in severe cases, local oozing, bleeding, blisters, low fever, weakness, fatigue and other symptoms. When the patient urinates, it can aggravate the symptoms of pain. Once diagnosed with glans, patients need to actively cooperate with the doctor to take relevant treatment measures to avoid delaying the condition. During the treatment period, you need to avoid early sexual life, keep the local skin clean and clean. At the same time, do not scratch the lesions to avoid secondary infection.