Exhibit 23.2
Consent of Independent Accountants
We hereby consent to the incorporation by reference in the Registration Statement on FormS-8 of Sienna Biopharmaceuticals, Inc. of our report dated 19 June 2017 relating to the financial statements of Creabilis Holdings Limited, which appears in Sienna Biopharmaceuticals, Inc.’s Registration Statement on FormS-1 (No.333-219142).
/s/ PricewaterhouseCoopers LLP
Cambridge, UK
1 August 2017
