Hard lumps deep in the vagina to the left are considered to be related to the cervix, cysts on the vaginal wall, tumors on the vaginal wall and other factors. 1. Cervix: If you touch the vagina with your hand and feel a hard lump on the left side, you can’t rule out the possibility that it is caused by the normal cervix, which does not belong to an abnormal mass. If you don’t have any other bad symptoms, you can come to the gynecology department of the hospital to rule out the abnormality, and if you don’t see any obvious abnormality, you can choose to observe it for the time being and not to deal with it. 2. Vaginal wall cysts: this is a benign gynecological lesion, some of the vaginal wall cysts are considered to be embryonic derivatives, which can be classified into two types according to their embryonic origin: paramedian tubule and mesonephric duct cysts, and may also be associated with the damage to the vaginal mucous membrane during childbirth, which continues to proliferate after the wound has healed, and can be treated with the doctor’s temporary observation or surgical excision. 3. Tumor of vaginal wall: there are benign and malignant tumors, if they are benign, they can be observed temporarily without symptoms, or they can be surgically removed when they produce pressure symptoms. If it is malignant, no matter whether there are symptoms or not, it is necessary to cooperate with doctors to carry out surgery and radiotherapy treatment. It is recommended that patients with hard lumps deep in the vagina to the left should actively cooperate with the doctor for examination and treatment, so as not to delay the condition.