Definition
The
term sciatica describes a symptom rather than a specific disease. Some use it
to mean any pain starting in the lower back and going down the leg. Others use
the term more specifically to mean a nerve dysfunction caused by compression of
one or more lumbar or sacral nerve roots from a spinal disc herniation. Pain
typically occurs in the distribution of dermatome and goes below the knee to
the foot. It may be associated with neurological dysfunction, such as weakness.
The pain is characteristically of shooting type, quickly traveling along the
course of the nerve.
As
per Ayurveda, gridhrasi (sciatica) is explained as one among 80 types of Vata
imbalance disorders (neurological / neuro-muscular disorder). The word
‘Gridhrasi’ is derived from the root word – ‘Gridhra’. Which means the bird
‘vulture’.
It
is observed that in this disease, the patient’s gait is altered as his legs
become tense, and slightly curved due to pain. Ultimately, the patients walk
similar to the walk of the vulture (gridhra). Hence the name Gridhrasi.
According
to another saying, sciatica is characterized by severe pain experienced by the
patient and it is similar to the pain one experienced by the prey of vulture,
while being eaten up.
Epidemiology
Depending on how it is defined, 2% to 40% of people
have sciatica at some point in time. It is most common during peoples 40s and
50s and men are more frequently affected than women.
The condition where back pain and radiating pain of
the legs are found together it is called Sciatica syndrome. In older times, as
per Ayurveda system of medicine, it was named as Gridhrasi.
Causes
-
1-About 90% of the time sciatica is due to a spinal
disc herniation pressing on one of the lumbar or sacral nerve roots.
2-
The straight-leg-raising test is often helpful in diagnosis. The test is
positive if, when the leg is raised while a person is lying on their back, pain
shoots below the knee. In most cases medical imaging is not needed.
3-Sciatica
is generally caused by the compression of lumbar nerves L4, or L5 or sacral
nerves S1, S2, or S3, or by compression of the sciatic nerve itself.
Sciatica is typically caused by irritation of the
sciatic nerve.
4-Spinal disc herniation.
Spinal disc herniation pressing on one of the lumbar
or sacral nerve roots is the primary cause of sciatica, being present in about
90% of cases.
5- Spinal stenosis.
6-Piriformis syndrome.
7-Pregnancy.
8-Spondylolisthesis: If a vertebra slips
forward over the vertebra below it, it’s called spondylolisthesis. This
slip can pinch the nerve root and cause sciatica.
9-Trauma:
Cardinal features:
Radiating
pain in the affected leg/legs is the typical characteristic feature of this
illness. Due to this, the patient walks with the gait of the bird, vulture.
Diagnosis
Straight
Leg test sometimes used to help diagnose a lumbar herniated disc.
Imaging
tests such as computerised tomography or magnetic resonance imagingcan help
with the diagnosis of lumbar disc herniation.The utility of MR neurography in
the diagnoses of piriformis syndrome is controversial.
Management
When
the cause of sciatica is lumbar disc
herniation, most cases resolve spontaneously over weeks to months.
Initially treatment in the first 6–8 weeks should be conservative. There does
not appear to be a significant difference in outcomes between advice to stay
active and recommendations of bed rest. Similarly,
physical therapy (exercises) has not been found better than bed rest.
Medication
Although
medicines are commonly prescribed for the treatment of sciatica, evidence for
analgesics is poor. Specifically, low-quality evidence indicates that NSAIDs do
not appear to improve immediate pain and all NSAIDs appear about equivalent.
Evidence is also lacking in use of opioids and muscle relaxants. In those with
sciatica due to piriformis syndrome, botulinum toxin injections may improve
pain and or function. There is little evidence for steroids, either epidural or
by pill. Low-quality evidence supports the use of gabapentin for acute pain
relief in those with chronic sciatica.
Ayurvedic view -
Etiological factors:
All
etiological factors of Vata imbalance disorders are the exclusive reasons of
sciatica too.
Common causes for sciatica-
v Intake
of Vata aggravating eatables like- adhaki (pigeon pea), chanaka (Bengal gram),
kalaya (peanut), masura (red lentil), nishpava (flat bean), uddalaka etc
v Excess
intake of dry, light and cold food
v Excess
intake of pungent, bitter and astringent food
v Heavy
weight lifting, long walk, improper lie or sitting positions
v Suppression
of urine, feces etc
v Improper
practice of enema, purgation etc
v Fall
or injury etc.
Symptoms of Sciatica:
Pain
starting from hip area and radiating to the thigh, back, sacral region,
popliteal area, calf muscles and foot.
Pricking
sensation in those parts
Altered
gait
Rarely
stiffness or pulsation etc. are mainly found.
Types:
Sciatica (
gridhrasi) is two type-
1. Vataja Gridhrasi
2. Vata-kaphaja Gridhrasi
Vata sciatica-
Curved
posture (altered gait) due to pain . severe stiffness, pulsation in back, hip,
thigh, knee and foreleg.
Vata-kaphaja sciatica-
Along
with the above features, indigestion, drowsiness, nausea, anorexia, heaviness
of the leg and freezing sensation in the lower limbs are complained.
Line of treatment:
Snehana -
Swedana - tub bath,
pizichil, sudation with oil added medicated herbal pastes (patrapinda sweda),
application of poultice (upanaha sweda) etc. are beneficial.
Mridu samshodhana–
mild purgation (Mridu Virechana) is preferred.
Basti (medicated enema)
Shiravyadha/ Rakta-mokshana ( blood letting)
– It is advised to perform 4 angula (3inch) above or below the knee joint.
Agni karma (cautery)-
is carried in the severe painful area or
near the little toe of the leg, using a metallic rod.
Herbs useful in gridhrasi :
i.
Nirgundi – Vitex negundo
ii.
Bala – Sida cordifolia
iii.
Punarnava – Boerhavia
diffusa
iv.
Eranda – Castor root –
Ricinus communis
v.
Shigru – Moringa
oleifera
vi.
Rasna – Pluchea lanceolata .
vii.
Masha – Black gram
Formulations useful in Gridhrasi (Sciatica):
v Yogaraja
guggulu
v Kaishora
guggulu
v Vishtinduk
vati
v Sahacharadi
kashaya
v Punarnavashtaka
kashaya
v Ekangaveera
Rasa
v Dasmoola
Kwatha
v Ashwagandha
Churna
v Triyodashanga
Guggulu
v Rasnaerandadi
kashaya
v Rasnasaptaka
kashaya etc
Panchkarma procedures
1- Matra
Basti
2- Agni
karma
3- Snehana
Swedana
4- Vaman
5- Rakatmokchana
6- Basti
karma
7-Kati Basti
Wholesome diet and habits in Sciatica:
Masha
(black gram)
Kulath
(horse gram)
Godhuma
(wheat)
Raktashali
(red rice)
Amlaphala
(sour fruits)
Dadima
(pome granate)
Draksha
(raisins)
Shigru
(drum stick)
Patola
(snake gourd)
Kshira
(milk)
Ghrita
(ghee)
Mamsarasa
(meat soup)
Dhanyamla
(sour gruel)
Eranda
taila (castor oil)
Tila
taila (sesame oil)
Avagaha
(tub bath)
Abhyanga
(oil massage)
Ushnodakasweda
(warm water bath) etc
Unwholesome diet and habits in Sciatica:
Kalaya
– peanut (Lathyrus sativus Linn.)
Chanaka – Bengal gram (Cicer arietinum Linn)
Rajamasha
(Raj maa)
Vegadharana
(suppression of urges)
Vyavaya
(sexual indulgence)
Vyayama
(heavy exercise)
Diva
swapna (day sleep)
Prajagarana
(sleepless nights)