A man has been arrested over the death of a woman after he allegedly implanted a plastic snowflake under her skin at a New South Wales Central Coast tattoo shop.

The body of the 30-year-old woman was discovered by her seven-year-old daughter in their Toowoon Bay home on April 12.

The tattooist and body modifier was arrested at his Terrigal home on Monday.

The woman allegedly underwent body modification surgery by the 37-year-old man three weeks prior to her death.

A post-mortem found septicaemia from an infected right hand was the cause of her death.

She allegedly complained about complications relating to the snowflake implant shortly after the procedure.

The man has been taken to Gosford Police Station and he was charged with manslaughter.

In a separate incident, a complaint from a 38-year-old woman who underwent a stomach procedure at the tattoo shop in November 2016 resulted in the man being charged with grievous bodily harm.

The man has been refused bail and is expected to face court on Tuesday.