(As an aside) Does anyone else here think that anonymous posting asking for help is a bit rude?
Anyway,
The best thing you can do is to change your deodorant as this one is cleanrly reacting poorly with your bodily secretions. Generally sticks and roll-ons are better than sprays.
Here's what you need to treat your current stain:
1.. Glycerin and Water (1 part Glycerin to 4 parts Water) 2.. Ammonia (20% solution) 3.. Acetic Acid (25% solution) white vinegar may substitute 4.. Hydrogen Peroxideand here's what you do:
Add the first treatment with a dropper or spoon and tamp well into the stain. Flush away using a spray as close as possible with absorbent cloths underneath and then dry by holding more absorbent cloths on the stained area. Add the ammonia using the same method then tamp, flush and dry once more. Before adding the acid solution make sure you have flushed away the ammonia otherwise one will neutralise the other. Add the acid and repeat the procedures for the ammonia. Finally if any staining remains add hydrogen peroxide and wait for a reaction. Wash the garment in the normal way.
Hope this helps.
-- DrClean