It's normal and common for your arm to be sore after getting a flu shot. Your symptoms may include pain, swelling, or redness where the shot was given. This happens because of the injection itself ...

Thimerosal-allergic patients were challenged with three intramuscular injections of thimerosal solution (100 µg/mL) into the arm; if no reaction was observed, the dosage was increased (to 0.1 mL ...

In one study, seven patients (26%) presenting with foot drop had had recent IM injections in the buttock. An additional 20 patients (74%) presented much later (Fatunde & Familusi, 2001).

For tame birds that will perch on a handler's arm, a 'body-corner-towel ... the large pectoral muscles are used for most intramuscular (i.m.) injections. Before administering an i.m. injection ...