TYH

, TYH or tyh may refer to:


 * Tsan Yuk Hospital, a public hospital in Sai Ying Pun, Hong Kong
 * Tyrosine hydroxylase the enzyme responsible for catalyzing the conversion of L-tyrosine to L-DOPA
 * tyh, the ISO 639-3 code for the O'du language in Vietnam and Laos
 * Thank You Hashem, an Orthodox Jewish campaign emphasizing gratitude