Causes of obesity
| *Listed separately from nutritional to ensure that psychosocial causes are not missed as a primary issue. |
| Common causes |
| Nutritional (exogenous obesity) |
| Psychosocial* |
| Rare causes |
| Syndromes—for example, Prader Wili, Bardet-Biedl |
| Endocrine |
| Hypothyroidism |
| Cushings |
| Hypothalamic lesions |
| Single gene defects |