I may have a disc bulge in c4 or c5 how long does this usually take to heal? i have an overdoor traction how often shld i use this?

No "healing" here: Disc bulges of the spinal column can be found in over 40% of MRI's of folks who are entirely have no complaints of pain. There is really no "healing" that occurs with a bulging disc since nothing is really "damaged" yet. It may or may not reduce itself depending on what you do with exercises, exertional activities etc. Use the traction device as instructed by your doctor or therapist.