That is exactly what mine was doing. Each deflation cycle was slightly worse than the one before it until one afternoon it was flat as a pancake. Figured I was too late, but nem recovered quickly with treatment. I must say, though, yours does look better in the photos than mine did, so if the deflation cycles are improving perhaps HT will prove unecessary. If, however, nem starts to look worse on deflation I would recommend treatment. Better safe than sorry.