Cellulitis after an IV: what to know

An IV punctures the skin, so bacteria can sometimes enter around the insertion site. Mild bruising or irritation may be limited to the puncture, while cellulitis usually makes surrounding skin increasingly red, hot, tender, or swollen. A firm vein, drainage, or a line that is painful during infusion may point to another IV complication and still needs assessment. Do not diagnose the cause from color alone. Read about [Cellulitis](/conditions/cellulitis/), [Painful Skin](/symptoms/skin-pain/), and [Skin Redness](/symptoms/skin-redness/).

Tell the nurse, doctor, or clinic team as soon as you notice a worsening IV site. Do not remove a cannula yourself unless the treating team instructs you. If the IV is still in place, stop using the limb for unapproved infusions and keep dressings clean and dry. The clinician may inspect the site, remove or replace the IV, and decide whether antibiotics or another treatment is needed. If the IV has already been removed, gently clean the skin and avoid rubbing or applying unprescribed creams.

Seek same-day review for redness that grows, increasing [Skin Swelling](/symptoms/skin-swelling/), pus, worsening tenderness, or a red streak moving away from the site. Get urgent help for [Fever](/symptoms/fever/), shaking chills, confusion, faintness, breathing difficulty, or marked weakness. These may signal a spreading infection, including [Sepsis](/conditions/sepsis/). Tell the clinician if you have [Type 2 Diabetes](/conditions/type-2-diabetes/) or a weakened immune system.

Ask whether the IV should be removed, whether a sample or scan is needed, how to care for the site at home, and which changes mean you should return urgently. Share the time the IV was inserted or removed, the medicines infused, and any allergy history.