A Study of Tirbanibulin Ointment and Diclofenac Sodium Gel for the Treatment of Adult Participants With Actinic Keratosis on the Face or Scalp

Inclusion Criteria: * A treatment field (TF) on the face or scalp (excluding lips, eyelids, ears, and inside the nostrils), that: a) is a contiguous area measuring 25 cm\^2, b) contains 2 to 8 clinically typical, visible, and discrete actinic keratosis (AK) lesions, and c) has an overall clinical picture that is consistent with Olsen grade 1 * If a women of child-bearing potential (WOCBP), that is, fertile, defined as a female in the life period from menarche and until becoming post-menopausal (no menses for 12 months without an alternative medical cause) or permanently sterile (with hysterectomy, bilateral salpingectomy or bilateral oophorectomy at least 3 months prior to Screening), she must: a) Have a negative urine pregnancy test using a highly sensitive method at screening and on Day 1 prior to treatment administration. b) Be using effective methods of birth control. c) Agree to have pregnancy tests while in the study and at the end of the study * Participants should be willing to avoid sunlight or ultraviolet (UV) light exposure, including the use of tanning beds, to the face or scalp during the study * Participants should have the ability to understand the purpose and risks of the study, willingness and ability to comply with the protocol, and provide written informed consent in accordance with institutional and regulatory guidelines Exclusion Criteria: * The location of the TF is: a) on any location other than the face or scalp. b) within 5 centimeters (cm) of an i…