The former The Only Way Is Essex Star was reportedly taken to hospital with serious facial injuries in the early hours of Thursday morning.
Reports indicate that Lauren, 35, was taken into hospital around 1am on Thursday morning.
According to The Sun, a man was arrested and taken into custody but was released on bail on Friday.
The alleged incident came hours after Lauren and her ex Charles Drury had held a funeral for their daughter Lorena, who died shortly after birth last month.
A Metropolitan Police spokesman told Metro.co.uk: ‘Police were called at 00:37hrs on Thursday, 4 August to reports of an altercation at a residential address in Upminster, Essex.
‘Officers attended. At the scene a woman, aged 30s, was found with facial injuries.
‘A man, aged 25, was arrested on suspicion of assault. He was taken to an east London police station and subsequently bailed pending further enquiries. Enquiries continue.’
A source told The Sun: ‘It happened after Lauren and Charlie came back from Lorena’s funeral.
‘They had a private family ceremony on Wednesday which was not publicised. It was obviously a very emotional time.’
Reality star Lauren shared in July that her second child, Lorena, died shortly after birth, with Lauren sharing she didn’t suffer any pregnancy or labour complications.
Lauren previously recalled watching as around 10 doctors fought to save her baby girl when they couldn’t find a heartbeat.
Lauren and Charles also share daughter Larose, one.
The star recently explained that she plans on having a post-mortem to determine what caused Lorena’s death, ‘for her own sanity.’
She said she didn’t experience complications during pregnancy, which she described as ‘textbook’, or the labour itself.
Recently speaking about her loss, Lauren said Lorena is ‘still there’ with her as her baby bump remained.
Describing her body as ‘unsettled’ and saying it feels like it’s ‘missing a newborn’, she told New magazine: ‘It shouldn’t happen. It breaks my heart that I won’t see her grow up.’
The TV star went on to explain how she ‘never ever thought I would have to plan a funeral for my child’.