Gar Irontooth:
<OOC: With the healing of Landor and my temp HP, i am at full which is 68/68 (Normally 58, but bonus 10HP with rage)>
Temporary HP don't heal up from Constituion. Once the rage ends (or you are knocked out, asleep, ect) you will lose them.
So your HP:
68/37
Healing
68/58
You 'lost' the Hit Points. At the end of the rage, your Con will go down so you will lost 10 more.