Education, not medical advice
The content on this site is general patient education. It is not a diagnosis, not a treatment recommendation, and not a substitute for a consultation with a clinician who has examined you. Judging altered sensation in particular is a clinical exercise: it depends on what was operated on, what was found at the time, and how the area has changed since. Do not use this site to decide that numbness is harmless, and do not use it to decide that it is serious — when in doubt, make the call.
The findings that need immediate care
New weakness, a limb that is cold, pale or blue, severe pain with the numbness, loss of bladder or bowel control, numbness around the groin and inner thighs, and sensation loss that is spreading rather than settling all require emergency care immediately. Numbness with new swelling, heat, redness or a fever requires care the same day, and burning or electric-shock pain that is worsening requires assessment within days.
The limits of recovery
Most numbness around an incision improves over weeks to months, and it recovers unevenly. Some numbness never fully recovers, particularly after a large incision, a second operation through the same area, or a branch that had to be divided. Nerve repair can reduce a deficit and can relieve pain caused by a trapped nerve, but it does not reliably return fine touch and it does not make a numb area normal.
When to seek care
Contact your treating team first for anything that is not an emergency; if the team cannot be reached, call the hospital main line. For weakness, a cold pale limb, loss of bladder or bowel control or numbness around the groin, attend the nearest emergency department immediately. Do not put heat on skin that has no feeling, and do not leave a sore, blister or burn in a numb area to be reviewed at a routine appointment.