Cancer of the oral cavity is one of the most common types of cancer in the head and neck area. It mostly occurs in the bottom of the mouth, on the tongue and in the area behind the molars. The most common type of cancer of the oral cavity is squamous cell carcinoma, which originates from the squamous cells of the epithelium of the mucous membrane of the oral cavity. It is among the top ten cancers with the worst outcome. The number of deaths is high because the disease initially has no symptoms. It is mostly discovered in advanced stages when treatment and recovery methods are difficult and the prognosis is worse. The incidence is associated with risk factors such as smoking, alcohol consumption, poor oral hygiene, poor dental status, viral and fungal infections, and premalignant conditions. The most common symptom is discomfort due to changes in the oral cavity in the form of ulcerative or non-ulcerative formations. The treatment method depends on the specifics and stage of the cancer. Surgery, radiotherapy and chemotherapy affect the physical, psychological, social and spiritual dimensions of a person and thereby reduce the quality of life. The consequences of the treatment process leave temporary or permanent problems. Some of them can be removed, while some who become a permanent patient should be accepted as part of their life. Any change causes difficult adjustment, but with the provision of quality health care by health personnel and family members, the patient's adjustment process is facilitated. Illness and changes also affect family members and change the dynamics of relationships within the family, especially if a family member becomes a caregiver and takes care of the patient. Therefore, the role of the nurse/technician is to carry out interventions aimed at achieving quality health care and raising the quality of life of the patient and family members.