Re: I'll be darned. Could it be the nettle leaf tea?

 Too cool. Huge thanks. More and more I'm beginning to determine it is all about the adrenals. A fundamental I presume you've understood/maintained all along.

The adrenals are very important, which is why I am always preaching about not  overdoing stimulants, staying away from pharmaceutical steroids and watching stress levels. The adrenals are so critical in maintaining proper immunity, hormones, fluid balance, inflammatory responses, stress responses, energy, etc.

But, with that said, is it also possible that some conditions/damages can develop beyond the point of no return?

The body is very resilient and in most cases can heal if given the proper nutrition and stimulation.

Seems everywhere I've read, every credible source I've encountered (practitioners of integrative/functional medicine) have claimed that this type of infection (when it reaches so deep into the sinus cavity) is nearly impossible to "cure".

The only sinus infections that I have seen that are hard to get rid of are fungal infections. Fungi thrives in the warm, moist environment of the sinus cavity. And any traces not removed can quickly rebound in to a major infection again. So they are hard to eliminate, but not impossible.