Livedo reticularis refers to various conditions in which there is mottled discolouration of the skin. Livedo reticularis results from disturbance of blood flow to the skin causing low blood flow and reduced oxygen tension to the skin. The usual reactions after an insect sting are mild redness and swelling at the stinging site, and the most serious reaction is anaphylaxis. There have been isolated reports of late-onset reactions, such as vasculitis, neuritis, nephritis and serum sickness, occuring in association with an insect sting. But there are no reports associated with an venom intakes. A 39-years-old male had been visited to ER for headache and reticular patterned rash on upper and lower extremities 7 days after homemade wasp wine intakes. CSF tapping test and Laboratory examinations were within normal limits except C-reactive protein elevated. He was discharged on prescription of aceclofenac(NSAID) and gabapentin. But he re-visited with persistent pain and rash. So he referred to our clinic. Clinically late-onset reaction was suspected that triggered by venom intakes. Treatment was initiated with oral methylprednisolone 24 mg/day. A histopathological study revealed basal hyperpigmentation, focal spongiosis and superficial perivascular lymphocytic infiltration. As the patient improved symptom, steroid was tapered. Herein we report an livedo reticularis patterned late-onset reaction, which was occurred by wasp venom intakes.