| Local | Systemic |
| • Gingivitis | • Thrombocytopenia |
| Chronic | Leukaemia |
| Acute necrotising | HIV infection |
| • Periodontitis | • Clotting defects |
| • Rarely, telangiectasia or angioma | Drugs such as anticoagulants |
| Local | Systemic |
| • Gingivitis | • Thrombocytopenia |
| Chronic | Leukaemia |
| Acute necrotising | HIV infection |
| • Periodontitis | • Clotting defects |
| • Rarely, telangiectasia or angioma | Drugs such as anticoagulants |