痔 combines 疒 (sickness) with 寺, which likely contributes the sound. The character specifically refers to hemorrhoids as a medical condition.
Meaning mnemonic
The sickness enclosure 疒 wraps around 寺, like a temple afflicted with a painful swelling. Picture a monk suffering from piles while sitting in meditation.
Reading mnemonic
For ヂ, imagine a painful hemorrhoid that makes you say 'jeez!' (ヂ sounds like a sharp 'jee'): jeez -> ヂ, and the temple monk winces.
