eurodynia--conditions which
have this in common, that sudden and severe pain is excited by movement
of the affected part. The lesion consists in inflammatory hyperplasia of
the connective tissue; the new tissue differs from normal fibrous tissue
in its tendency to contract, in being swollen, painful and tender on
pressure, and in the fact that it can be massaged away (Stockman). It
would appear to involve mainly the fibrous tissue of muscles, although
it may extend from this to aponeuroses, ligaments, periosteum, and the
sheaths of nerves. The term _fibrositis_ was applied to it by Gowers in
1904.

In _lumbago_--_lumbo-sacral fibrositis_--the pain is usually located
over the sacrum, the sacro-iliac joint, or the aponeurosis of the lumbar
muscles on one or both sides. The amount of tenderness varies, and so
long as the patient is still he is free from pain. The slightest
attempt to alter his position, however, is attended by pain, which may
be so severe as to render him helpless for the moment. The pain is most
marked on rising from the stooping or sitting posture, and may extend
down the back of the hip, especially if, as is commonly the case,
lumbago and gluteal fibrosis coexist. Once a patient has suffered from
lumbago, it is liable to recur, and an attack may be determined by
errors of diet, changes of weather, exposure to cold or unwonted
exertion. It is met with chiefly in male adults, and is most apt to
occur in those who are gouty or are the subjects of oxaluric dyspepsia.

_Gluteal fibrositis_ usually follows exposure to wet, and affects the
gluteal muscles, particularly the medius, and their aponeurotic
coverings. When the condition has lasted for some time, indurated
strands or nodules can be detected on palpating the relaxed muscles. The
patient complains of persistent aching and stiffness over the buttock,
and sometimes extending down the lateral aspect of the thigh. The pain
is aggravated by such movements as bring the affected muscles into
action. It is not referred to the line of the sciatic nerve, nor is
there tenderness on pressing over the nerve, or sensations of tingling
or numbness in the leg or foot.

If untreated, the morbid process may implicate the sheath of the sciatic
nerve and cause genuine sciatic neuralgia (Llewellyn and Jones). A
similar condition may implicate the fascia lata of the thigh, or the
calf muscles and their aponeuroses--_crural fibrositis_.

In _painful stiff-neck_, or "rhe