This study explored the experiences of individuals who self‐identify as providing support to a friend, family member, or significant other with posttraumatic stress disorder (PTSD). We analyzed and coded a total of 345 posts from an online support forum, with reference to 13 categories (finances, life interference, venting/emotional expression, maltreatment, sexual behavior, distress, prevented expression, physical health, communication, no personal space, isolation, and compassion fatigue).