Adam Baxter, director of broadcasting standards at Ofcom, warned that they are keeping a close eye on Love Island and similar shows that involve "emotionally challenging" situations and high levels of interest on social media.
Baxter also said that the watchdog has the power to take away broadcaster's licence to broadcast.
He told the Radio Times: "We are talking about shows like Love Island that attract a high level of media or social media interest, involve conflict, emotionally challenging situations, or require a person to disclose life-changing or private aspects of their lives.
"We've also made clear that, before a person agrees to take part in a TV or radio show, broadcasters must tell them about any possible risks to their welfare, and how they will seek to minimise these."
He added: "We have the power in the most serious of cases to fine broadcasters or take away their licence to broadcast. However, we would only use these powers in the most exceptional of cases."
The comments from the Ofcom boss comes after some viewers threatened to complain to Ofcom after contestant Hugo Hammond was snubbed during the line of booty challenge last week.
Last month, Love Island revealed its new duty of care protocols. Contestants from the current series will be offered a 'minimum of eight therapy sessions' once they return home from the island, ITV confirmed.
The hit ITV 2 dating show has established a new duty of care programme after the suicides of two former contestants Sophie Gradon in June 2018 and Mike Thalassitis in March 2019 and former host Caroline Flack in February 2020.
ITV has explained that each Islander will receive: comprehensive psychological support, social media training about the impact and potential trolling, financial management training, detailed conversations about the show's impact on their lives, a proactive aftercare package, and advice on taking management after the show concludes.
Former islander Dr Alex George has penned an emotional statement after the recent trolling of Chloe Burrows. Her family, who are currently running her Instagram account, said death threats had been sent to her account.
Love Island is on weeknights at 9pm on ITV 2 and ITV Hub. The episodes are available to stream on BritBox the following morning.
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