Improved survival after breast cancer treatment comes at a cost in the form of increased risk of late effects. A number of these are summarised in this review. The late effects can be divided in 1) late effects after locoregional treatment, e.g., lymphoedema, impaired shoulder movement, and pain; 2) consequences of systemic treatment, e.g. polyneuropathy, problems related to premature menopause, and increased risk of cardio-vascular disease; and 3) general late effects, commonly seen across all cancer types, including fatigue, insomnia, and cognitive impairment. There is a need for more knowledge about risk factors, prognoses, and the most effective treatments.