The midline of sacrococcygeal region has a sinus of 1 or more, which is small, and the surrounding skin is red, swollen and hardened, often with scars.
touch
A long oval or irregular induration area can be felt near the sinus crossing, and a thin and odorous liquid can be discharged during extrusion. In acute attack, there are acute inflammation, tenderness, redness and swelling, and more purulent secretions are discharged, and sometimes abscesses appear.
3. Probe inspection
The probe can reach 3 ~ 4 cm, some can reach deeper, the distal end is blind and does not communicate with the rectum.
4. Image inspection
Imaging examination and ultrasound examination can further help the diagnosis and differential diagnosis of pilonidal sinus. The range, depth and trend of pilonidal sinus can be understood by angiography. X-ray examination can distinguish bone destructive diseases (tuberculosis) from sacrococcygeal teratoma; Intraluminal ultrasound can distinguish sacrococcygeal pilonidal sinus from anal fistula.