Amy Dowden has revealed she suffered a setback” in her cancer treatment when she was diagnosed with “life-threatening” sepsis.

The Strictly Come Dancing professional dancer said she was treated in intensive care after her first round of chemotherapy earlier this month.

She wrote on Instagram: “I recently suffered a setback in my cancer treatment and spent several days in hospital and needing care by an ICU team.”

Dowden, 33, announced in June that she had undergone a mastectomy after discovering that she had stage three breast cancer.

Caerphilly-born Dowden later said doctors found another type of cancer and has since been documenting her experiences, hoping it will raise awareness and encourage others to check themselves.

She told Hello! magazine she first started feeling ill two days after her first round of chemotherapy and started getting a temperature.