Post-injection care is straightforward: Stay hydrated for the remainder of the day Avoid rubbing or massaging the injection site aggressively Apply a cold compress if swelling or soreness develops at the injection site Monitor for signs of allergic reaction (hives, difficulty breathing, dizziness) for at least 30 minutes Contact your provider or seek emergency care if you experience chest tightness, significant swelling, or breathing difficulty Strenuous exercise can resume the same day for most patients, though some prefer to wait until the following morning if injection-site soreness is noticeable
But that process is slow, incomplete, and often produces scar tissue instead of healthy connective tissue
Some people become B12 deficient due to other reasons such as a medical condition or alcohol misuse
[DOI] [PubMed] [Google Scholar] 9.Errick J.E., Ing K.W., Eggo M.C., Burrow G.N
This article reviews B12 injections and whether they are something you should consider
But the delivery method (whether the capsule dissolves in the upper or lower digestive tract) shapes where and how it may act in the body