In conclusion, this thesis demonstrated an association between inflammatory dermatological diseases, i.e. psoriasis and hidradenitis suppurativa, and the metabolic syndrome putting these two patient groups at cardiovascular risk. Therefore, it is recommended as a minimum to screen hidradenitis and psoriasis patients attending in/outpatient clinics for the metabolic syndrome aimed at prevention of cardiovascular disease. The increased risk of metabolic syndrome adds to the range of well-known disease-related burdens e.g. the physical skin symptoms, the psychological impact thereof, and other co-morbidities, thus highlighting that both hidradenitis and psoriasis patients require general medical attention beyond the skin.