The former Love Island contestant and TV presenter revealed her symptoms on Instagram, and asked her followers for help in calming down the physical elements.
Speaking from her bed, McDermott said on Instagram Stories: "I actually have a really bizarre question to ask some of you, if you know the answer. So, recently, I mean, I wasn't diagnosed, I told my GP about my fingers going white in changes of temperature.
"They will go completely numb and it’s the most awful sensation. Like, I can’t even explain. A lot of people actually have this, when you literally feel like you have a hole in your finger. It’s awful."
She added: "It’s got a little bit worse recently and its showing up a little bit more. A lot of you have suggested about looking into autoimmune conditions, because this can be the two things that come hand-in-hand, the Raynaud’s and the facial flushing.
"But to be honest, I don’t have any symptoms at all. I would just be looking for something wrong with me at this point.
"A lot of you are saying you can go on medication for the Raynaud’s. I don't think it’s that bad I just wondered if there was a cream I could put on my face.
"The Raynaud’s is not in a good space at the moment. I couldn’t text because my hands were so white and I’m dreading filming outside."
According to the NHS, Raynaud's Syndrome, or Raynaud's phenomena, is a circulation condition where blood vessels in extremities such as hands and feet go temporarily into spasm.
The relatively common condition causes the extremities to go numb, white, or in some cases blue, as circulation is lowered.
It's not known what causes the syndrome to take effect, often showing up in your 20s and 30s, but is amplified by stress and/or cold temperature.
Once the blood flow returns those with the condition are likely to feel pins and needles and experience redness in the area as sensation comes back.
Severe cases require medication.
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