Model Chrissy Teigen has fired up her social media war of words with US President Donald Trump by attacking him for complaining about the pain of a coronavirus test.

Fuelled by actress and writer Sarah Thyre's comments on Trump's complaints, Teigen reminded him that she had given birth twice -- and his COVID-19 check-up cannot be more painful, reports aceshowbiz.com.

Teigen retweeted Thyre's post, in which she wrote: "Our s**tprez is b***hing about how invasive the Covid test is and excuse me, I've had multiple hands shoved up my vagina to try to pull out a single d**n baby -- and you are b***hing about a swab up your f**king nose that could save millions of lives."

Then Teigen added: "My vagina was ripped to my a**hole giving birth to (daughter) Luna... f**k your swab pain. they had to put a garbage bag at the end of the bed to collect my blood before stiching me up, where I then had to pee using a water bottle as a pain fountain for 3 months. so yeah. the swab, I bet it's super rough."

Teigen's rant is the latest in a long line of social media attacks on Trump, which began as soon as he took office.