Louis Tomlinson's sister, Lottie Tomlinson, underwent emergency surgery in Abu Dhabi in June 2025 due to appendicitis after feeling unwell during a flight. She recovered and was resting at a hotel afterward. Regarding Louis Tomlinson's sibling history, his younger sister, Félicité Tomlinson, tragically died at age 18 in 2019 from an accidental drug overdose. Their mother, Johannah Deakin, passed away in 2016 after battling leukemia. Lottie has spoken openly about the family's grief and how she took on a caring role for her siblings after these losses.