POWER OF ATTORNEY

I, Susan Horvath, hereby authorize and designate each of, W. Morgan Burns,
Joshua L. Colburn, Justina A. Roberts and Tonya R. LaBrec and signing singly,
as my true and lawful attorney-in-fact to:

(1) execute for and on my behalf, in my capacity as an officer and/or
director of Sun BioPharma, Inc. (the "Company"), Form ID or Forms 3,
4 and 5 in accordance with Section 16(a) of the Securities Exchange Act of
1934 (the "Exchange Act") and the rules and regulations promulgated
thereunder and other forms, reports or other documentation on my behalf as
may be required to be filed in connection with my ownership, acquisition,
or disposition of securities of the Company, including Form 144, or relating
to my credentials for the electronic submission of filings to the U.S.
Securities and Exchange Commission, including passphrase reset requests;

(2) do and perform any and all acts for and on my behalf which may be
necessary or desirable to complete and execute any such Form ID, Forms 3,
4 or 5, or other forms, reports or other documentation and file the same
with the U.S. Securities and Exchange Commission and any stock exchange or
similar authority; and

(3) take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be to my
benefit, in my best interest, or legally required of me, it being understood
that the statements executed by such attorney-in-fact on my behalf pursuant
to this Power of Attorney shall be in such form and shall contain such
terms and conditions as such attorney-in-fact may approve in such attorney-
in-fact's discretion.

I hereby further grant to each such attorney-in-fact full power and authority
to do and perform any and every act and thing whatsoever requisite, necessary,
or proper to be done in the exercise of any of the rights and powers herein
granted, as fully to all intents and purposes as I might or could do if
personally present, with full power of substitution or revocation, hereby
ratifying and confirming all that such attorney-in-fact, or such attorney-in-
fact's substitute or substitutes, shall lawfully do or cause to be done by
virtue of this Power of Attorney and the rights and powers herein granted.
I hereby acknowledge that the foregoing attorneys-in-fact, in serving in such
capacity at my request, are not assuming, nor is the Company assuming, any of
my responsibilities to comply with Section 16 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until I am no
longer required to file Forms 3, 4 or 5 with respect to my holdings of and
transactions in securities issued by the Company, unless earlier revoked by me
in a signed writing delivered to the foregoing attorneys-in-fact.
Notwithstanding the foregoing, if any such attorney-in-fact hereafter ceases
to be at least one of the following:  (i) a partner or employee of Faegre
Baker Daniels LLP or (ii) an employee of Sun BioPharma, Inc., then this Power
of Attorney shall be automatically revoked solely as to such individual,
immediately upon such cessation, without any further action on my part.

I hereby revoke all previous Powers of Attorney that have been granted by me
in connection with my reporting obligations under Section 16 of the Exchange
Act with respect to my holdings of and transactions in securities issued by
the Company.

IN WITNESS WHEREOF, I have caused this Power of Attorney to be duly executed
as of this 12th day of April, 2018.

/s/ Susan Horvath