It may depend on the reason for the rash.
Rash ointments for babies are often some form of zinc oxide or vitamins A and D and are made to be gentle for the skin so it should't irritate the arm pit and may help. You can also try some kind of baby powder or corn starch.
If the rash doesn't go away after a few days, you should present the rash to a medical practitioner.
Under the arm "arm pit"
only 90% of human can lick their arm pit. (that does include flexible people)
arm pit
Use a hot wash cloth at least twice a day if it don not go down within a couple of days consult your physician for a type of ointment that you can buy over the counter.
in your arm pit
Under the arm "arm pit"
what causes shooting pain under right arm pit
AxillaryAxilla
deodorant.
Arm Pit - 2013 was released on: USA: 9 March 2013 (Chicago Underground Film Festival)
Of course if u r a beauty lady.............
Natalie Proctor of Dallas Texas is the best arm pit farter. Hands down, well arms down....