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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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Should I Be Concerned About A Painful Lump Caused After Vitamin B12 Shots?

Last October I was diagnosed with severe haemolytic anemia and was given huge doses of Prednisone as well as weekly vitamin B-12 shots. About 7 or 8 weeks ago the nurse who gave me my weekly B-12 shot appeared to have punctured a vein, as for about a month afterward there was a rather large lump under the skin and a big bruise on top. All of that has gone now, except for a small, pea-sized lump where the big one was and it s causing some pain every now and then. Is this something I should be concerned about - should I see my doctor? Or should I just wait, since the big lump went down so much perhaps it will continue to disappear on its own? Thanks for any help.
Mon, 25 Mar 2019
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General Surgeon 's  Response
Hi,

Since the lump has become small in size and not causing any symptoms other tan discomfort means the reaction or infection due to injection has been under control.
You may please ask for high resolution ultrasonography and aspiration if there any fluid.
Take a course of an antibiotic and anti-inflammatory medications if there is any evidence of remnant infection or so.
Secondly take care and management for the severe anemia till it is cured. Continue oral medications well.
Increase the foods with more iron contents like green leafy vegetable, Pomegranate.
Watch for any blood loss like hemorrhoids or so and get treated accordingly.

Hope I have answered your query. Let me know if I can assist you further.

Regards,
Dr. T Chandrakant,
General Surgeon
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Should I Be Concerned About A Painful Lump Caused After Vitamin B12 Shots?

Hi, Since the lump has become small in size and not causing any symptoms other tan discomfort means the reaction or infection due to injection has been under control. You may please ask for high resolution ultrasonography and aspiration if there any fluid. Take a course of an antibiotic and anti-inflammatory medications if there is any evidence of remnant infection or so. Secondly take care and management for the severe anemia till it is cured. Continue oral medications well. Increase the foods with more iron contents like green leafy vegetable, Pomegranate. Watch for any blood loss like hemorrhoids or so and get treated accordingly. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. T Chandrakant, General Surgeon