Disc herniation, stenosis of the spine and spondylolisthesis are the common causes of radiculitis in medical practice today, and can cause symptoms of sciatica. Steroid injection, acupuncture and platelet-rich plasma injection are often used interventions for the treatments of sciatica. The investigators will investigate the efficacy and safety of steroid injection, acupuncture and platelet-rich plasma injection for sciatica in this single center, parallel, randomized-controlled clinical trial.

Steroid injection, acupuncture and platelet-rich plasma injection are often used interventions for the treatments of sciatica. The investigators will investigate the efficacy and safety of steroid injection, acupuncture and platelet-rich plasma injection for sciatica in this single center, parallel, randomized-controlled clinical trial.

Participants will be randomized into 3 groups (steroid injection, acupuncture and platelet-rich plasma injection) by central allocation. Randomized participants will complete a questionnaire that solicited information regarding age, sex, marital status, occupation, education, and medical history. The blinding credibility of the treatments will be evaluated at the end of the treatment.

Participants in steroid injection group will receive Triamcinolone 1pc plus lidocaine 1% 1cc injection at neuritis nerve roots. Participants in platelet-rich plasma injection group will receive 15cc blood draw first to concentrate into platelet-rich plasma and then inject at neuritis nerve roots. Participants in acupuncture group received standardized acupuncture treatment. hat treatment was accomplished by selecting a group of acupuncture points that predefined. Acupuncture points will be bladder meridian pattern acupuncture points including Shenshu (BL23), Qihaishu (BL24), Dachangshu (BL25), and Guanyuanshu(BL26). The needles will be inserted perpendicular to a depth of 5 to 35 mm depending on the acupuncture point, which was followed by manual stimulation by bidirectional rotation to induce Deqi sensation. Deqi was defined as a dull, localized, and aching sensation, which signaled the attainment of qi.

Outcome Measures Primary Outcome Measure The primary outcome measure is visual analogue scale for sciatica. To understand the impact of sciatica on the participants' life, visual analogue scale for bothersomeness is chosen instead of pain intensity. The participants will be asked to mark, on a 10 cm visual analogue scale (0, absence of bothersomeness; 10, the worst bothersomeness imaginable), the average degree of bothersomeness due to sciatica experienced within the most recent 1 week from the day of the assessment. This measurement has substantial validity. Bothersomeness of sciatica will be measured at baseline, 1-, 2-, 4-, 8-, 12-, 16-, and 24-week.

Secondary Outcome Measures Numeric Rating Scale for pain intensity is a simple method evaluating the subjective intensity of pain. Pain intensity will be measured in the same way as visual analogue scale for bothersomeness. Validity of its reliability has been demonstrated. The Chinese version Oswestry Disability Index is used to measure back pain-related dysfunction. Health-related quality of life will be measured using the well-validated EuroQol 5 dimensions (EQ-5D). A higher score is indicative of a better general health status. Participants satisfaction will be evaluated with 5 point scale (1 is worst, and 5 is best)

We will perform the Shapiro-Wilk normality test to determine whether or not the sample values followed a normal distribution and finally assumed normality according to the test result. For the description of baseline characteristics, mean with standard deviation (SD) for continuous data and frequency with percentage for dichotomous data will be described. Also, for the homogeneity test of baseline characteristics between 3 groups, 2-sample t tests for continuous data and chi-square test for dichotomous data will be performed. A mixed-model approach of repeated-measures 2-factor analysis will be used to analyze the difference and mean change in baseline, 1-, 2-, 4-, 8-, 12-, 16-, and 24-week visual analogue scale score, Oswestry Disability Index, EQ-5D, patient satisfaction difference and mean change between groups, interaction between groups, and periods.

Inclusion Criteria:

1. Female or male, 20 to 80 years of age.
2. Participants who had dermatome between L3 to S1, or participants whose straight leg raising test was positive, or participants had Meyerding Grade I to II spondylolisthesis or herniated intervertebral disc or spinal stenosis diagnosed by X-rays, Magnetic resonance imaging or computed tomography.
3. Participants whose sciatica symptom doesn't have occur time limit.
4. Participants who agreed to follow the trial protocol.
5. Participants who could complete the study treatment and assessments.
6. Participants who had steroid or pain control injection can participate the study after receiving injection more than 3 days.

Exclusion Criteria:

1. Participants with severe progressive neurological symptoms (e.g. cauda equina compression).
2. Participants who had undergone surgery for lumbar disc herniation within 6 months.
3. Participants whose sciatica symptom wasn't caused by lumbar radiculopathy.
4. Participants with cardiovascular, liver, kidney, or hematopoietic system diseases, severe psychiatric or psychological disorder, or cancer.
5. Women who were pregnant.
6. Participants with a pacemaker, metal allergy, or severe fear of needles.

There is no plan to make individual participant data available to other researchers.