Carrie Johnson has revealed she was rushed to hospital with severe dehydration caused by the hot weather.
The wife of former Prime Minister Boris Johnson, who last month gave birth to her fourth child, Poppy, was admitted for two nights this week.
After her experience and with temperatures due to surpass 30C this weekend, Mrs Johnson issued a warning to other breastfeeding mothers.
Writing on Instagram on Friday, she said: ‘Being hospitalised for two nights for severe dehydration was not on my postpartum bingo card.
‘Breastfeeding mums make sure you eat and drink enough in this heat. Especially if your babe is clusterfeeding.’
Clusterfeeding is when a baby feeds very frequently for a period of time, before going for longer gaps between wanting milk.
Mrs Johnson also revealed that she had been suffered from mastitis, a form of breast inflammation.
She added in her social media post: ‘This week has honestly been brutal. Mastitis (me), Reflux (her), Dehydration (me).

Carrie Johnson has revealed she was rushed to hospital with severe dehydration caused by the hot weather

Mrs Johnson, 37, said they are ‘totally smitten’ with their new baby girl whom they have named Poppy Eliza Josephine Johnson

Boris Johnson is pictured with his fourth child with wife Carrie
‘What a pair we are! But thank you for all the kindest messages, especially all the brilliant advice on reflux.
‘Really appreciate it and made me feel way less alone going [through] it all. And as ever, thanks to our amazing NHS.’
Mrs Johnson previously said her and Boris were ‘smitten’ with their newborn baby daughter, named Poppy Eliza Josephine Johnson.
The former Prime Minister was pictured cradling Poppy in hospital, after her birth on May 21.
Poppy is sister to Frank, Romy and Wilfred, who was born during the Covid lockdown in April 2020.
Romy was born in December 2021 and Frank in July 2023.
Announcing the birth on Instagram, Mrs Johnson said ‘I can’t believe how pretty and tiny you are. Feel so incredibly lucky. We are all totally smitten.
She added: ‘Not sure I’ve slept a minute since you were born as can’t stop looking at how completely lovely you are.’

Mrs Johnson posted to Instagram to announce Poppy’s birth alongside a series of pictures and said she is their ‘final gang member’

Poppy has become little sister to Wilfred, Romy and Frank who were ‘utterly delighted’ to welcome a new member of the family

Poppy was born at University College London Hospital and is the couple’s fourth child
Friends of the couple said they left the sex of the baby a surprise, and had been expecting a boy.
Mrs Johnson wrote ‘Wilf, Romy and Frank are utterly delighted, particularly Romy who was desperate for a little sister. Bring on the matching dresses.’
She also kept the pregnancy largely a secret. She gave birth in University College London Hospital and thanked the ‘amazing’ maternity team in her social media post.
Announcing the baby name, Mrs Johnson wrote her nicknames are ‘Pops, Pop Tart’. Her middle name Josephine was chosen after Carrie’s mother.
She also suggested the baby would be the final one for her family, writing: ‘A final gang member.’
She posted a sweet picture of Romy holding her baby sister, as well as a photograph of Wilfred stroking her head.