Exhibit 23.2
Consent of Independent Accountants
We hereby consent to the use in this Registration Statement on FormS-1 of Sienna Biopharmaceuticals, Inc. of our report dated 19 June 2017 relating to the financial statements of Creabilis Holdings Limited, which appears in such Registration Statement. We also consent to the reference to us under the heading “Experts” in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
Cambridge, UK
17 July 2017
