Hi welcome to Health care magic forum. As it it is there is no documented side effect of emiting a bad odour. It could be due to interaction with the diet you take during the period of taking methamphitamine.
There is a side effect of hallucination , by olfactory hallucination
you may feel there is some smell coming out of your body,This you can confirrm by asking whether they are getting the smell when you are feeling the smell.
First of all you confirm whether you are using it by prescription, or as an o.t.c.product,I advise you to consult a physician for veining off the drug, he will give you some substitute while slowly withdrawing the drug.
Wishing for a quick remedy of the problem and thanks for calling.