The Aid Spell

[Bluemanarc]

Definitely not healing. All healing spells specify you regain hit points. Aid goes out of it's way to say it increases your current hit point total. And, as noted, the number added to the current hit point total will go down by the same amount when the spell ends, unlike healing spells.

If what you say is correct.

Then the equation is still 0 + 5 = 5

As you are increasing your current hit point total by 5

This is simple math, how can you get confused ?