lump under skin after b12 injection Lumps or swelling your injection? Don't panic it's more common than you think. This usually comes from injecting in the same spot too often, not letting the oil fully disperse, or Common & Rare Side Effects
Description
Translates to 0.12mL to 0.4mL (12 to 40 units on a U-100 syringe)

Don't ignore these signs

Most antibiotics, methotrexate, and pyrimethamine invalidate folic acid and vitamin B12 diagnostic microbiological blood assays
Clean the skin with an antiseptic before
