Butt pimples

TMI - I gave birth on 10/29 and have been wearing pads and maternity underwear since then. I’m usually in leggings or sweats right now. All of the sudden I’m getting big pimples right outside of my crack on both sides. I shower daily and typically never have a problem with pimples on my body. Is this from wearing a pad or is it hormones? And does anyone have any remedies?