What should I do after my blood draw?

Question

Accepted Answer

Post-draw care is minimal for most patients. Here are the recommended steps:

Apply firm pressure to the puncture site for 2–5 minutes (or until bleeding stops)

Keep the bandage on for at least 30–60 minutes

Do not rub the site — this can cause bruising

Avoid heavy lifting or strenuous arm exercise for the next few hours (prevents hematoma)

Eat a snack if you fasted, especially something with carbohydrates and protein

Drink plenty of fluids to replace blood volume and prevent lightheadedness

Small bruise at the puncture site

Mild tenderness for 24–48 hours

Slight lightheadedness immediately after (especially if you fasted)

Significant swelling or hardening under the skin (hematoma) — apply a cold compress

Excessive bleeding that does not stop with pressure

Numbness or persistent pain in the arm (rare nerve irritation)

Fever within 24 hours (infection, very rare)

Contact your provider if you experience anything concerning.

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