- Doyoung trained for five years.
- He appeared on the survival reality show, Stray Kids, in 2017 as one of the YG trainees.
- He is good friends with Ciipher's Dohwan.
- He is allergic to apples, strawberries and kiwis.
- His parents are rumored to be doctors.
- He has various types of medicine and vitamins on his bag.
- On July 13, 2021, Doyoung was confirmed positive with COVID-19 and took a break to recover.