The problem with endoscopic microdisectomies is that tears cannot be repaired. A 4mm tear might heal on its own but can leave a pseudomeningeocele (a false pocket of fluid-CSF).
The best treatment is lying down for about three days. Do not get up as healing is disrupted when you stand up due to the pressure rise in the CSF in the spine.
If headaches continue, a new MRI would be helpful and then a procedure called a blood patch. This is where the injectionist withdraws about 20cc of blood out of a vein and injects this blood around (but not into) the dura in the epidural space.