Dear Lynn:
What do you mean by the "reverse of cold and hot feeling on the limbs"?
Do you mean "tingling" or "asleep"?
And, I am not familiar with a particular insect that could cause this without the presence of a bite, sore, or ulceration.
What part of your husband's leg is "numb"? The foot? The inside or outside?
Was he wearing pants or shorts at the time when he believes that he was bitten.
Does your husband have a history of lower back pain or sciatica?
~•~ Dr. Parks
This answer is not intended as and does not substitute for medical advice. The information presented in this posting is for patients’ education only. As always, I encourage you to see your personal physician for further evaluation of your individual case.
Dr. Parks will reply to your message on 4/15 when he returns to the office.