Safety and Efficacy of Low Intensity Shockwave Therapy in Treating Diabetic Foot Ulcers

* Inclusion Criteria: 1. Chronic non-healing diabetic foot ulcers for more than 2 months. 2. Age 18-80 years 3. Ankle Brachial Index (ABI) ≥0.6 4. Diabetic Foot Ulcer with the long diameter of ≤7cm and a short diameter of ≥1cm 5. The target ulcer is up to Wagner's grade 3 6. Albumin level ≥25g/L 7. Hemoglobin level ≥90g/L 8. Estimated Glomerular Filtration Rate (eGFR) ≥30ml/min/1.73m2 9. The patient agrees to comply with study protocol requirements, including the shockwave procedure, self-care of the ulcer (dressings, orthotics etc.) and all follow-up visit requirements * Exclusion Criteria: 1. Pregnancy or lactation 2. ABI \<0.6 3. The long diameter of the target ulcer is \>7cm and the short diameter is \<1cm 4. The target ulcer is of Wagner's grade 4 or above 5. Severe Hypoalbuminemia \<25g/L 6. Severe anemia, Hemoglobin level \<90g/L 7. eGFR \<30ml/min/1.73m2 8. Patients suffering from acute Charcot foot 9. Severe edema of the treated limb 10. Patient with present malignancy or past malignancy in the treated area 11. Systemic chemotherapy/ radiation treatment within the last 6 months 12. Deep vein thrombosis within the last 6 months 13. Any other experimental treatment or participation in other studies \-