Should I live with a deviated septum or get the surgery done? I'm having breathing problems from asthma/allergies and have bad post nasal drip.

Could be allergy. I would first see a board-certified allergist to determine if your symptoms are due to allergy & to what. The surgery would not help asthma nor underlying allergies.
Have it repaired. Nasal airway function and draininge are inter-related, and can have many headaches, infections, worsening of asthma, etc if left alone. This is a true functional problem and should be recongnized as a medically necessary procedure. I suggest you contact a qualified sinus surgeon for care, and have appropriate xrays to insure sinus outlet obstruction is not also a factor.

Related Questions

I have a deviated nasal septum, which is giving breathing problems. What can I do to alleviate the breathing?

Surgery. If you have a mechanical obstrucion of your airway-"deviated septum" mechanical treatment-surgery is the treatment. Read more...
Deviated septum. a deviated septum can be corrected surgically to bring the septum to the midline. If there are symptoms like nasal obstruction, snoring or recurrent sinusitis, have your nose evaluated by a board certified otolaryngologist. Read more...

If deviated septum is only causing occasional right side nose congestion, but no breathing problems, or bloody nose, is surgery unnecessary?

Likely. The nasal septum in not exactly in the center in most people. If it is not causing any issues, surgery is not necessary. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex. Read more...