Head and neck cancer patients require oral assessment and management prior, during and after cancer treatment to minimise oral complications. Hence, this study aimed to evaluate sociodemographic data, oral health management, oral complications derived from cancer treatment, time frame in completing dental treatment and association between oral management and complications. Purposive record sampling of head and neck cancer patients who completed radiotherapy and/or chemotherapy at Hospital Universiti Sains Malaysia (HUSM) from 2011 to 2017 were reviewed. A checklist was used to record the data and analysed using descriptive statistics and Pearson Chi-square test. A number of 194 patient records were reviewed with majority were Malays (88.1%), males (61.3%) with the mean age of 57.18 years old. Only 21% of the patients had oral assessment prior to cancer treatment. About 84% of the referred patients were dentally fit within 1 month. Mucositis and fungal infections were the most prevalent complications. The relationship between oral assessment prior to cancer treatment and oral complications was not significant (p = 0.134). Despite the insignificant association due to several limitations, oral assessment and management prior, during and after cancer therapy are recognised as crucial for improving quality of life. A standard institutional operating procedure is recommended to improve patient care.