How do you manage injection site reactions?
Most mild injection site reactions—such as redness, itching, swelling, or soreness—can be managed at home and usually settle within a few days. Apply a cold compress or ice pack wrapped in a cloth for 10–15 minutes at a time to reduce swelling and discomfort. An oral antihistamine (from a pharmacy) can help with itch and redness; simple pain relief like ibuprofen or paracetamol may also be used if suitable. Rotate injection sites each time and check technique to reduce repeat irritation; seek medical advice if symptoms persist beyond a few days, worsen, feel very painful, or look infected. Call 999 immediately if there are signs of a severe allergic reaction (anaphylaxis), such as breathing difficulty, swelling of the face/mouth, widespread rash, or feeling faint. [1][2][3][4][5]
- Use a cold compress/ice pack to reduce swelling and soothe the area. [3][1]
- Consider an antihistamine for itch/redness; use simple pain relief if appropriate. [3][2]
- Rotate injection sites and review technique to prevent repeat irritation. [1][2]
- Most reactions are mild and resolve within 3–5 days; monitor rather than over-treat. [2][5]
- Seek NHS advice if pain, redness, or swelling does not improve or gets worse. [1][2]
- Call 999 for anaphylaxis symptoms like breathing difficulty, facial swelling, or faintness. [4]