Thanks for your query.Based on the facts that you have posted it appears that your father has undergone a surgery of Decompression Laminectomy
and had problem in passing Urine and Stools.He was catheterised for two days and now has burning micturition this is mostly due to catheter induced infection of the Urethra. Please take some antibiotic like Ciprofloxacin
twice daily for a week . The problem will get resolved .
As regards difficulty on passing stools, it is normal to have constipation
after any spinal surgery
. Take some stool softener
like Isabgol in the evening. This will also get cured in 2-3 weeks.