PURPOSE: To explore caregivers' writings about their experiences caring for adult individuals with cancer on a social media health communication website. PARTICIPANTS & SETTING: Journal entries (N = 392) were analyzed for 37 adult caregivers who were posting on behalf of 20 individuals with cancer. CaringBridge is a website used by patients and informal caregivers to communicate about acute and chronic disease. METHODOLOGIC APPROACH: A retrospective descriptive study using qualitative content analysis of caregivers' journal entries from 2009 to 2015.