Hospital admissions where obesity is a factor have more than doubled in England during the last four years, new figures from NHS Digital suggest.
There were almost 617,000 appointments in 2016-17 where obesity was either a primary or secondary diagnosis - up from 292,000 in 2012-13.
Primary diagnoses involve weight-loss treatment, while secondary ones include hip problems and heart attacks.
Public Health England said it showed obesity was a "significant challenge".
Obesity is linked to a range of health problems, including heart disease, diabetes and cancer.