 [ Symptoms ] i have had a left knee replacement using the zimmer flex lps and i have had nothing but pain in the knee and outside  the ortho said there is nothing wrong when he looked at my xray and said i should go for a second opinion this replacement was done 6mo ago dec 6th when going to the site for the brand of knee it has numerous issues posted by other patients any other input would be appreciated [ Disease ] trigeminal neuralgia is the most probable diagnosis usually it does not respond to medicines steroids can help to some extent ct guided radiofrequency ablation is being used in recent days for such kind of diseases