When police broke into the house after being called by neighbours who heard the child's screams, the 15-month-old baby girl was found 'starving' in her cot, the Daily Mail reported.
Police found the house in Brecon town of Mid Wales in UK was dark and cold, with dirty clothes, empty wine bottles, beer cans and dirty nappies strewn over the floors.
The child had been on her own for more than 24 hours. She was examined by a doctor and was found to have severe nappy rash, which was bleeding.
The 20-year-old woman kept the toddler in a cot on her own in a cold and dark house and would 'pop back' once a day to feed her with breakfast cereal.
She would then return to a friend's home to drink between last Christmas and New Year.
The single mother wept yesterday as she was jailed for 15 months on charges of neglect.
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"The house was in a state of disarray with rubbish, dirty clothes, empty wine bottles, beer cans and dirty nappies strewn over the floors," Prosecutor Michael Hammett said.
"One of the officers went into the bedroom and found the little girl subdued in her crib. There was no heating on in the house and she was partly covered by a blanket," Hammett was quoted as saying by the paper.
The mother's actions were described as causing "pain and suffering and misery for the baby".
The woman, who earlier this year pleaded guilty to neglect between Boxing Day and January 2, later told police she had been back to the house on four occasions to feed her baby but then left her alone again.
"You may have gone back to the house on occasions but the fact is you neglected her for a very long time," jailing her at Merthyr Crown Court, Judge John Curran told the mother.
"Your daughter was left in the dark and cold, she was hungry and thirsty and had not been changed for days," Curran added.
It is understood that the child is now being cared for by her paternal grandparents.