5'4, 130lbs, ticklish stomach after lipo 1 year ago, is it going to go away?

Since you are now a year from liposuction, you will probably keep this sensation. However, you could try to desensitize your nerves to make it less bothersome. Please discuss this with your surgeon.

Just know that you're not alone when it comes to unusual sensations after a procedure. Everyone's body responds to surgery, or trauma, differently. In fact, your body can't tell the difference between trauma and (cosmetic) surgery). Often times, nerve regeneration (specifically sensory nerves) can give the feeling of burning, zapping, or an uncomfortable feeling. This feeling, however, typically resolves by 12 months post-surgery, on average. Hope this helps. -Dr. Sean Satey, Beverly Hills, CA.

From your description it sounds like some hyperactive nerves. There are various techniques you can use to calm this area down a bit. Some have improvement with using ice intermittently or tactile desensitization. Hopefully over time you will find some relief.