A soft-tissue ultrasound of the buttocks is a non‑invasive imaging scan that uses high‑frequency sound waves to visualize muscles, subcutaneous fat, bursae, fluid collections, cysts, abscesses, hematomas, foreign bodies and soft‑tissue masses. It helps diagnose pain, swelling, infection or trauma, and can guide injections or drainage. The exam is quick, radiation‑free and operator‑dependent; no special preparation is usually required.

Small bumps on the buttocks commonly come from epidermal/sebaceous cysts, lipomas (benign fatty lumps), infected hair follicles or boils, pilonidal cysts, hidradenitis suppurativa, or less commonly a swollen lymph node or hematoma. See a clinician if the bump grows, becomes red, painful, warm, drains pus, or is accompanied by fever — avoid squeezing it; you may need antibiotics, drainage, or imaging/biopsy.

Do you mean the orthopaedic "buttock test" used to assess sciatica/serious hip pathology (buttock sign) or a routine check for injection/skin issues on the buttock? Which context should I describe?

A gluteus ultrasound evaluates gluteal muscles, tendons and nearby soft tissues to diagnose tears, strains, tendinopathy and trochanteric bursitis; detect fluid collections, hematomas, abscesses, cysts or soft‑tissue masses; identify foreign bodies; and assess inflammation or blood flow. It’s also used to guide injections or aspirations and to monitor healing, offering real‑time, noninvasive imaging.

A lump in the cleft between the buttocks is most commonly a pilonidal cyst — a hair-filled, infected sac that causes pain, swelling, redness, and sometimes pus or a draining sinus. Other possibilities include epidermal cysts or benign lipomas; rarely tumors are malignant. Treatment ranges from antibiotics and drainage to minor surgery. See a clinician if it’s painful, draining, feverish, or recurrent.

Yes, musculoskeletal ultrasound can detect many soft-tissue injuries — tendon and muscle tears, ligament damage, bursitis, fluid collections, hematomas, cysts and some nerve entrapments. It provides real-time, dynamic imaging and Doppler for inflammation. Limitations: it is operator-dependent and less reliable for very deep structures or bone marrow pathology; MRI is often preferred for complex or deep injuries.