Radiating pain to neck should subside with pain killer given for post operative pain.
Prolonged period of extraction may sometimes lead to neck cramp,if the head was positioned in an uncomfortable manner from the patient's aspect, in order to achieve better access,visibility to the teeth extracted.
Locally apply, nanofast gel, 4 times a day on neck region.
Next Steps
if doesn't subside contact your dentist.
Health Tips
try to sleep in proper posture. in case neck cramp is the reason of pain.