Inclusion Criteria:  Age > 18 years. Isolated plantar fasciitis through more than 6 months Ultrasonic verification of diagnosis (plantar fascia >4 mm) Ability to follow the post-operative- and conservative plans Able to give informed consent.  Exclusion Criteria:  Previous surgical treatment of plantar fasciitis or surgery around the heel Rheumatic disease Diabetes Dementia Neuropathy Known alcohol abuse Pareses/paralysis of the affected extremity.