Carpal tunnel syndrome
Pressure on the median nerve at the wrist that often causes numbness, tingling, and night-time symptoms in the thumb, index, and middle fingers.
Hand conditions
What it might be, common triggers, and when to get seen — with sources.
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Conditions
15 entries with sources
15 conditions in the library.
Filter the cards below by name, topic, or common phrases. Education only — not a diagnosis. Press slash (/) anywhere on this page outside a text field to jump to search.
Also hand-adjacent: if the wrist or hand is not your only sore area, read hand therapy when more than the hand hurts — scope, clinician coordination, and what the app does today.
Trigger finger
A finger or thumb that catches or locks when you bend it, often with a tender lump at the base of the finger. The tendon catches as it slides through its sheath.
De Quervain's tenosynovitis
Painful swelling of two thumb-side wrist tendons, especially with lifting babies, pouring jugs, or wringing. The tendons are pinched as they pass through their sheath at the wrist.
Thumb base arthritis
Wear at the saddle joint at the base of the thumb (the carpometacarpal or CMC joint). Pain with pinching, opening jars, and turning keys is common.
Scaphoid fracture
A break in a small wrist bone (scaphoid) often caused by a fall onto an outstretched hand. It can be missed on early X-rays and may need re-imaging.
Mallet finger
A fingertip that can't fully straighten on its own after a sudden bending force injures the extensor tendon at the end joint (the DIP joint).
Dupuytren's disease
A slow thickening of the tissue layer (fascia) under the skin of the palm. Cords can pull one or more fingers in toward the palm over time, making it hard to straighten them fully.
Ganglion cyst
The most common lump in the hand. A fluid-filled cyst that often appears on the back of the wrist. It can change size, may be painless, and is not cancer.
Boutonnière deformity
An injury to the tendon that straightens the middle joint of a finger (the PIP joint). The middle joint stays bent while the fingertip bends back. Early treatment matters — it can become permanent if missed.