An Isle of Wight man bit his own mother on the head and left her "scared in her own home".
Appearing before magistrates last Friday via video link from HMP Isle of Wight, Joshua Green, of Yarborough Road, East Cowes, admitted assault by beating and criminal damage.
Liz Miller, prosecuting, said Green has a history of violence against his mother and since living with her, he has been "horrendous" and she has been left "scared" of him.
On January 14, while at home, Green got in his mum's personal space, despite her pleading with him not to.
Ms Miller said he tried to bite her on the head, but left no marks.
While waiting for the police, he smashed a bottle of vodka, and had earlier broken the banister on the stairs.
Defending, Oscar Vincent, said both parties have a history of altercations and reconciliations.
He said both are vulnerable and Green is someone who has "significant childhood trauma", which has impacted his mental health.
He said the bite was only attempted and there was no complaint about injuries.
This was contested by Ms Miller who read out the mum's account.
The report said: "Josh has opened his mouth and tried to bite my head. I didn't have any marks but it did hurt."
Green was remanded in custody until his next appearance at the Isle of Wight Crown Court on February 9.
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