Almost every antiperspirant has an aluminum compound in it that make me red, swollen, and itchy. I can only use alum free deodorant, as antipersepeants genuinely cause me pain after a few days of use. The weird thing is I don't even have sensitive skin, no allergies, and I regularly get all manner of metal shavings and various carcinogenic chemicals on me (gas, diesel, parts cleaner, ATF, gear oil I could go on) and don't have any issues with eczema or anything but the antiperspirant sticks will fuck my week up. Ymmv but if u find a speed stick makes u itchy or uncomfortable see if it has alum, and if it does switch to without.