Hi, thanks for writing to HCM.
This is just to let you know that some amount of pain, tingling sensation
will be felt commonly during the immediate post operative period of a Microdiscectomy.
This is considered as NORMAL and it usually resolves spontaneously within few weeks.
Also, its a general practice that the operating surgeon will remove only the disc protrusions that are causing impingement on the nerve
roots and not all the disc protrusions visible on the MRI
So, you might be experiencing some amount of pain due to a disc at some other non operated level (L4-L5 in your case). This disc may cause problems to you once it causes pressure on the nerve root. The only way to avoid this is by limitation of forward bending movements.
Hope this information is helpful. Good day