IntroductionThe currently accepted best practice radiation treatment for left breast cancer patients is Deep Inspiration Breath Hold (DIBH) where patients hold a deep breath to reduce late cardiac and pulmonary effects from treatment. DIBH can be challenging and induce or exacerbate anxiety in patients due to the perceived pressure to reduce radiation treatment side effects. This study explored the experiences of patients treated with Deep Inspiration Breath Hold Radiation Therapy (DIBH‐RT) to improve patient‐centred care and inform the design of multimedia educational tools for future patients undergoing DIBH.MethodsThis descriptive qualitative study was underpinned by a social constructivist approach to create new educational and patient care approaches based on previous patients' experiences. Semi‐structured interviews were conducted with patients who had completed DIBH‐RT for breast cancer. Data was analysed with reflexive thematical analysis.ResultsTwenty‐two patients were interviewed with five key themes identified: (1) informational needs, (2) care needs, (3) autonomy, (4) DIBH performance influencers and (5) other centredness. Recommendations were derived from these themes to improve future treatments of DIBH patients. These recommendations revolved around improvements to education, patient‐centred care and strategies to improve self‐efficacy with breath holding.ConclusionPatients offer a wealth of knowledge regarding their lived experiences with treatment which can enhance future patients' experiences if incorporated into their education and care. Eliciting patients' views of their DIBH‐RT treatment highlighted the need to improve patient self‐efficacy with DIBH through familiarity with their planned treatment from new multimedia education, and foster patient care to enhance their experience.