TV presenter Fearne Cotton has revealed she will undergo an operation to remove two benign tumours from her jaw.The podcast host announced the news in an Instagram video on Tuesday, as she revealed she has been supported by fellow presenter Davina McCall, who had surgery on a rare brain tumour last month.Cotton, 43, said: "I've got a benign tumour just in my jaw here, below my ear, another little tiny one above it."I'm very grateful they're benign but they do need to come out because they're on a nerve.