A 49-year-old man diagnosed with metabolic syndrome (MetS) was referred to us for treatment of xanthoma elements. Physical examination revealed widespread confluent yellow firm papules on his fingers, toes, arms, legs, and back. The diagnosis of eruptive xanthoma (EX) was clinically confirmed. During the examination of scar tissues, tombstone comedones and an inflammatory nodule was noted on his abdominal folds and right groin. These are diagnostic signs of hidradenitis suppurativa (HS), a condition the patient had reportedly suffered for 15 years without being diagnosed. The patient's HS nodule was treated with intralesional triamcinolone injection, and prophylactic resorcinol was initiated, and he was referred to endocrinologists for xanthoma management. Three weeks later he returned due to newly developed lesions on his preputium, which caused a painful phimosis. Both HS and EX are correlated with MetS and causes increased all-cause cardiovascular mortality. As the average diagnostic delay of HS is 7.2 years, it is likely that timely diagnosis of HS would have identified the patient as being at risk of developing MetS. With proper preventive measures, the resulting EX lesions and increase in cardiac mortality could have been avoided.