AceShowbiz - Paris Hilton has fired back at trolls who have been mocking the size of her baby son's head. The hotel heiress, 42, who welcomed her nine-month-old boy Phoenix with her entrepreneur husband Carter Reum, also 42, via surrogate in January, has been left stunned by the abuse her boy has received since she posted an image on Instagram of her holding him on his first trip to New York City on Thursday, October 18.

"(Eye roll and crying face emojis) there are some sick people in this world. (Sad face emoji) My angel is perfectly healthy. And yes, of course he has been to a doctor, he just has a large brain," the "Simple Life" reality TV star commented on the clip after a TikToker created a video defending Paris and her son.

Trolls had mocked the boy by joking he has "a lot on his mind" - with one asking if he was suffering from encephalitis, a rare syndrome that causes the brain to swell.

Paris told People about achieving her goal of becoming a mum after Phoenix's arrival, "It's always been my dream to be a mother, and I'm so happy that Carter and I found each other. We are so excited to start our family together, and our hearts are exploding with love for our baby boy."

She shared the first photos of her and Carter's son one month after his birth, but has kept snaps of him to a minimum. When he reached six months old she posted, "This Barbie is a Mom (hearts and baby face emojis)."

"My baby boy Phoenix is 6 months old today (kissed face emoji). He is my world and makes my life feel so complete. Can't wait for all the magical memories we will create together! (Star emoji). Mommy loves you so much angel baby (angel face emoji)."

Paris has also told how she would like to have a daughter with Carter. She told Glamour UK in February, "I have all boys (embryos.) I have 20 boys … I just went through the process again a month ago, so I'm waiting for the results to see if there's any girls."