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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Flexing Of The Arm And Fingers Post Receiving An Allergy Shot?

My grandson received an allergy shot in his Right arm Tuesday at 230 PM. At 315 PM his whole Right arm is flexed/contracted, his fingers flexed and contracted. I gave him Benadryl and his arm muscle relaxed. So this evening at 6 in gymnastics with use his Right arm became flexed/contracted and his fingers also. I gave him 12.5 mg of Benadryl . Its 815 and his R arm and fingers remain flexed. I talked with the oncall MD. thanks Cindy
Thu, 28 Jun 2018
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General & Family Physician,  's  Response
Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice.

It seems while your grandson was given an allergy spot his muscle/tendon got hurt/injured. The muscles responsible for the flexion of the forearm are brachiradialis, brachialis, Bicep brachii. This flexor contracture and may cause pain later. Visit an ER & get him examined. He needs medications like tramadol or some muscle relaxant. But first the degree of hurt should be assessed.

Hope I have answered your query. Let me know if I can assist you further.
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What Causes Flexing Of The Arm And Fingers Post Receiving An Allergy Shot?

Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. It seems while your grandson was given an allergy spot his muscle/tendon got hurt/injured. The muscles responsible for the flexion of the forearm are brachiradialis, brachialis, Bicep brachii. This flexor contracture and may cause pain later. Visit an ER & get him examined. He needs medications like tramadol or some muscle relaxant. But first the degree of hurt should be assessed. Hope I have answered your query. Let me know if I can assist you further.