I keep getting red bumps in my armpits. quit using any deodorant for over a month. just washing with regular soap. both sides.what should i do?

Red bumps: It is probably from shaving under your arms or a reaction to a hair remover depending on which you use. I would use some hydrocortisone 1% and clear the rash and then figure out what it is that makes it reappear.

See your doctor: You probably have an inflammation of infection of the sweat glands or hair follicles. You may need topical or even oral antibiotics or combination of these plus steroids to get rid of it. Itching vs soreness can help distinguish between allergic contact dermatitis vs infection.

Get checked: If you keep getting the bumps, you may have an infection. You should get into a physician and get them checked. You may need an antibiotic to get it cleared up.