red rash after b12 injection COVID-19 vaccine delayed skin reaction: Redness, a week shot Tirzepatide - crazy (?) injection

In 2 randomized controlled trials conducted by Xu et al, 24,25 the administration of vitamin B12 in varying forms in patients with postherpetic neuralgia and acute ophthalmic herpetic neuralgia sustainably and significantly decreased their pain severity for up to 1 year compared with controls receiving intramuscular injection of vitamin B12 and lidocaine

How do I know if I'm low in Vitamin B12

Most fade in days to about two weeks, depending on where you got treated

Reduced folic acid intake is associated with hyperhomocysteinemia

Vitamin B12 is naturally found in foods that are high in meat and organ meats, poultry, fish, eggs, and dairy products, and some food manufacturers fortify the vitamin B12 content when making the food