The Upside Down singer - who welcomed a daughter with partner Leyman Lahcine this week - announced on Instagram she had been diagnosed with acute breast engorgement.
According to the NHS website, breast engorgement is when the breasts get too full of milk and it can happen in the early days when the mum and the baby are still getting used to breastfeeding.
The website says: "It can take a few days for your milk supply to match your baby's needs."
She wrote: "This is what your milk coming in does to you. It f*cks you up. Now my nips have cracked too.
"Engorged. Cracked. Emotional. Missing first child great combo."
The picture came hours after she revealed she had turned to cabbage leaves in an attempt to soothe her breasts following the diagnosis.
Paloma took to Instagram to share a photo of the cabbage. She wrote in the caption: "Day 3 and my milk has come in...
"I've been diagnosed with acute engorgement. This means I have too much milk and the baby isn't big or strong enough to drain it and get it out. It's painful. The boobs are rock hard.
"I'm trying massage while feeding, it hurts so much like a deep tissue massage and not much is helping.
"Hot showers/massage/hand expressing and poor baby is really over it with the exhausting hard work she needs to do to get the milk out of all those swollen blocked ducts.
"I've been told it should settle. Let's hope I don't end up in a and e with it before that!
"This is some next level pain! Mum life is REALLLLLLL."
Paloma has been sharing her pregnancy journey step by step on social media since the beginning, offering candid insights into the joys and struggles of being a mum-to-be.
She also documented her new baby's arrival on Monday.
Sharing a photo of her newborn's feet and a snap of her in hospital, Paloma captioned the post: "Well I'm not pregnant anymore! I had a planned C-section yesterday I'm in a lot of pain and didn't sleep last night but it's worth it to see and meet the new little cherub I have in front of me.
"It's been about 30 hours and already I'm exhausted, sore and my nipples are on fire with a baby piranha that wants to kill me. On them every few hours but I am of course elated!
"This baby couldn't be more loved or wanted if she tried (yes I have two gals)," she said "I'm now going through the constant worry of bottle vs breast, last time I breast fed exclusively and I think it was too hard! I don't know if I wanna put myself through that this time..... but I'm trying anyway.
"And my nipples are on fire. Lost a litre of blood and I'm in so much pain despite the pain killers. The joys!"
Fair play to Paloma for being so honest about her journey!
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