I find it worse, the emptier I am. So it will be fine at the start of a feed but then towards the end, it becomes painful and those little teeth marks appear. I usually counteract that by swapping sides before the first is drained but obviously, if you are only feeding from one side that isn't exactly helpful

Another idea would be to express some so your breast is extra full and there is too much milk, therefore not feeding with a reduced amount but that is also not very practical. I've got DD2 to increase my supply which helps.

I hope you can find a solution that works for you