Feeling worse after B12 Injection: Answering concerns. La Vie Med Spa Feeling tired all the time, tingling in your hands or feet, poor concentration, or burning feet could be signs of Vitamin B12 deficiency. Early diagnosis and proper treatment can help protect your Feeling tired, foggy, or run down? It could be a B12 deficiency Weekly B12 injections help support: Increased energy + reduced fatigue Sharper focus + better mood Boosted Constantly tired despite sleeping? Vitamin B12 and fatigue axunio Vitamin B 12 intramuscular injections are also used therapeutically to help restore energy and combat various symptoms related to such deficiencies. Vitamin B 12 is essential to the development of healthy blood cells, nerve