Neuropathy is a good suggestion ,I have this and it is murder I take large doses of Oramorph ,I also wear Pain patches these are very strong I wear 4 and change every 3 days's, apart from these I take other prescription pain relief
I went to our Hospital where there is a Pain Management consultant,they are very good ,at the end of the day you are the only one who knows what pain you are in ,please speak with your Doctor and sort out some help with your pain ,once you have your prescription it is then up to you to work out what you need to relieve the symptoms.
Good Luck Kind Regards