In recent months, Lizzie has been worrying fans as she continues to show off her dramatic 10-kilogram weight loss.
"[She's] looking so thin and sick, hope all is OK. Hopefully, you can put some kilos back on. This does not look good on you," one fan wrote on an Instagram photo she posted which highlighted her slender frame.
Another added: "No-one is being nasty or horrible, just stating the facts. Lizzie has a warm, generous soul, however, I would be worried if she was my daughter. She doesn't look well, but if she's happy that's all that matters."
As we know, Lizzie suffers from photosensitivity which she told WHO last year is "a mild cousin of lupus". According to the brunette beauty, gluten and alcohol can trigger the condition which can also cause her weight to go up or down by 6 kilograms.
“I get a lot of the lupus symptoms and when I’m in a flare-up, I burn, as if you’re holding fire to the skin,” Elizabeth told us. “It’s hard for me to even be near a window."
She also told her fans earlier this year that she'd been diagnosed with Porphyria— a condition which also results in weight fluctuation.
"There's been a lot of curiosity out there, people saying to me, 'How have you lost a bit of weight?'" she revealed. "What I want to put out there is that I have porphyria, and how you manage porphyria is with a high carb diet. I use chocolate because my body can tolerate it right now. Before I get the 'there are healthier alternatives', it is working for me currently, and I get scared to try a lot of foods because my body also rejects 'healthy food' too, it's not biased.
"Also lots of people out there have to be on medication, and unfortunately weight gain can be a common side effect for a lot of chronic illness meds or chronic illness in general. Sometimes the weight gain in this can be more than 20 kilograms."