Answer
Repeated injections into one place can cause fatty or amyloid lumps and unpredictable insulin absorption. Rotate sites and seek advice before moving suddenly from a persistently lumpy area.
Sources for this answer
- Hypurin Porcine 30/70 Mix Vials (PL 29831/0118) — Current selected SmPCemc · Summary of Product Characteristics
- NHSNHS · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.