Two readings. chuàng (this entry, 4th tone) covers everything about creating, founding, initiating. The
创 reading (1st tone, see the chuāng entry) is the original 'wound / cut' sense, surviving in
创伤 (trauma),
创口 (wound),
创可贴 (Band-Aid),
重创 (heavy damage). If the word is medical or describes injury, chuāng; if it's about making something new, chuàng.