Sexual health is important for the quality of life of patients who have received haematopoietic stem-cell transplantation (HSCT). Sexual dysfunction and couple dissatisfaction can seriously affect a patient's recovery and treatment process. However, this aspect of post-transplantation recovery is still usually neglected in clinical practice. In this Series paper, we aim to elucidate the emotional and psychosocial factors affecting the sexual function in these patients, with a special focus on the partner's role and the psychological consequences of some adverse effects of HSCT. Moreover, we provide an overview of the management approaches and assessment tools of psychological issues associated with sexual dysfunction reported in the literature. These tools can help clinicians in this field to plan essential lifestyle and clinical interventions to help their patients. In conclusion, screening for psychological issues is indispensable when approaching sexual dysfunction in patients with HSCT. Health-care teams in transplantation units should be trained to discuss this aspect of recovery and provide the required treatment and follow-up plan.