Married At First Sight’s, Zoe Hendrix, has been diagnosed with mastitis after eagle-eyed fans alerted her on Instagram.

The reality TV star, who gave birth to her first child in November, wrote on social media on Friday that she had been struck down with the flu, shares Daily Mail.

However some of her 70,000 followers alerted her to the fact it was likely she had an infection from breast feeding which exhibited flu-like symptoms.

The 27-year-old had shared a photo of her slumped sick in bed with headphones on, her daughter Harper Rose lying across her stomach.

In the caption, Zoe described herself as ‘SICK AS a flea bitten dog in the backstreets of Bali’.

‘I’m in bed with a temp of 39, sore throat, body aches and an 8 week old.

‘I salute all you mums/dads with chronic and serious illness who get up everyday and push through the pain and take care of your kids,’ she added.

Several fans remarked it was possible she had mastitis.

The illness is common in new mothers who breastfeed and occurs when a milk duct becomes blocked, causing the surrounding tissue to be inflamed.

One follower wrote: ‘As soon as I read your comment and saw your temp I though mastitis straight away, get to the dr Hun, especially if there is redness around the sore spots.. It’ll only get worse if you don’t get meds.’

Another fan commented: ‘It sounds like mastitis. Get to the doctor right now.’

Later Zoe followed up with another image of her and Harper Rose as they took a bath.

In the caption she thanked fans for all their earlier comments, and confirmed she did in fact have mastitis as a result of breastfeeding.

‘THANK to all you wonderful and switched on followers who informed me about Mastitis in my last post (which I thought was just the flu),’ Zoe wrote.

‘I have been on antibiotics, pain relief, and my angel of a mother in law has been helping me care for Harper. I am starting to feel human again after feeling like I was hit by a truck!’

She also added the hashtag: ‘Thank you Insta fam’.

The power of social media. Sometimes it is a wonderful thing!

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Image via Instagram