What should you know about vasculitis limited to skin?

The usual pattern is small red or purple spots, sometimes raised and sometimes tender or burning. The lower legs are a common place to notice it because gravity and standing can make the pattern more visible. Lesions may come in crops and can leave temporary brown staining as they settle.

The label skin-limited describes the current assessment, not a promise that no further review is needed. A clinician considers recent infections, medicines, autoimmune symptoms, and signs involving the kidneys, lungs, joints, nerves, or digestive system.

Keep a record of new spots, take photographs, and mention recent illnesses or medicines. Resting with the legs supported, avoiding prolonged standing when possible, and protecting the skin from knocks may improve comfort. Do not begin or stop steroid treatment without medical guidance.

A clinician may request blood or urine checks and may take a small skin sample to confirm the pattern. Mild cases may settle with monitoring and trigger management. More active disease may require prescription treatment, including [Oral Corticosteroid Treatment](/treatments/medical-dermatology/oral-corticosteroid-therapy/), chosen according to the findings.

Seek prompt care if the rash spreads quickly, becomes very painful, forms ulcers or blisters, or occurs with fever or marked weakness. New blood in the urine, reduced urine, breathing symptoms, severe abdominal pain, numbness, or swollen painful joints can signal involvement beyond the skin and needs urgent assessment.

What findings support skin-limited disease? Do I need blood, urine, or biopsy checks now? Which medicines or infections could have triggered it? How long should I monitor the skin, and which new symptoms should prompt urgent review?