"Ultrasound-Enhanced Propolis Therapy for Healing Diabetic Foot Wounds"

Participants will receive conventional wound care including debridement, cleaning, and dressing. A sham ultrasound device that emits no therapeutic waves will be applied to simulate the intervention procedure.

Participants will receive topical application of 10% propolis gel on the diabetic foot ulcer followed by therapeutic ultrasound (phonophoresis) using 1 MHz frequency, 0.5-1.5 W/cm² intensity, pulsed mode (20%), for 5 minutes per session, 3 sessions/week for 4 weeks.