Family caregivers face multiple challenges when caring for patients with oral cancer at home. Understanding the difficulties they face may assist health professionals to better organise and provide support for family caregivers of oral cancer patients. The aim of this study was to describe the caregivers' primary tasks and the difficulties they encounter when caring for a family member with oral cancer. This qualitative study included a purposeful sample of 22 primary family caregivers ranging in age from 25 to 71 years old. The researchers used face-to-face, semi-structured and tape-recorded interviews to collect data and employed qualitative content analysis to elicit caregiving-related themes. Six task-related themes and associated challenges were identified. These included managing the patient's nutritional issues, investigating and making decisions about patient care, managing sudden and unpredictable changes in the patient's condition, managing emotional distress, adjusting their attitudes towards patient care, and seeking resources. Family caregivers handle such essential tasks when they care for patients in home settings and they face specific challenges related to them. This study identified several challenges related to each task. From the outset, healthcare providers should actively offer caregiving information and strategies. Health professionals can incorporate strategies for supporting caregivers' ability to carry out these tasks into their treatment model and can help caregivers manage difficulties that can impede them from doing so.