saddle sores from chami stitching

I'm getting really bad sores on my backside (not nether regions) from where my chami is stitched into my shorts, and wondered if anyone had any suggestions for preventative measures.

I use Chamois Butt'r and will try Bag Balm next.

I don't think there is a problem with the saddle or bike fit (this hasn't changed and I didn't have problems before). I think my skin has got softer/more susceptible or my sweat has got more salty.

I'm wondering if anyone tried to modify their shorts (putting super soft material over the stitching), wearing seamfree supersoft underwear, or taping their backside in problem areas?

Get rid of the shorts and never buy a pair with the same chamois again - seriously. I had a pair that did that. The seam was like a little saw and would leave a crescent shaped cut on my unhappy booty. None of my other shorts do this, nor should they. Don't try to make them better, cream on the seam doesn't help, thinking you'll just save them for short rides is wishful thinking... just throw them away. If they are new and the place you bought them from has a satisfaction guarantee return them.

Is the stitching between your skin and the saddle, or is it higher up, off the saddle?

If you're sitting on it, it might help to get shorts with a larger, 1-piece chamois so that you're not sitting on any stitching. That's what I did when I had similar problems.