Consensus criteria for the diagnosis of HUVS (Schwartz et al)2
| Major criteria (must have both) | Urticarial rash |
| Hypocomplementemia | |
| Minor criteria (must have 2) | Leukocytoclastic vasculitis |
| Arthritis or arthralgia | |
| Glomerulonephritis | |
| Episcleritis or uveitis | |
| Presence of anti-C1q antibodies | |
| Recurrent abdominal pain |
HUVS, hypocomplementemic urticarial vasculitis syndrome.