What to expect from a cortisone injection for De Quervain's tenosynovitis

De Quervain's tenosynovitis affects the tendons on the thumb side of the wrist. A clinician cleans the skin, uses a fine needle to place medicine near the irritated tendon sheath, and may use ultrasound to guide the position. You may feel brief pressure or a sharp sting. The injection calms local inflammation; it does not repair every factor that is straining the wrist, so improvement can be partial or temporary.

Soreness can increase briefly after the injection. The skin may look lighter or thinner at the injection site, and people with diabetes may notice a temporary rise in blood glucose. Tell the clinician about medicines, allergies, diabetes, infection, or previous injection reactions.

Keep the wrist and thumb relatively quiet on the day of the procedure. Follow the clinician's advice about a thumb-and-wrist splint, then return to movement gradually as pain settles. Avoid forceful gripping, lifting, wringing, and repetitive thumb movements until you can do them comfortably. Gentle exercises or physiotherapy can help restore tendon glide and identify activities that need adjustment.

Use the recommended pain-relief plan and keep the injection area clean. Track whether opening jars, typing, lifting a child, or other thumb movements become easier; this gives your clinician useful information at follow-up.

Contact the treating service promptly if redness, warmth, swelling, drainage, or worsening pain develops around the injection site, or if you develop a fever. Seek urgent help for facial swelling, trouble breathing, faintness, or widespread hives. Arrange review if wrist pain remains severe, thumb movement becomes more limited, or symptoms return after initial improvement.

Ask which tendon sheath will be targeted, whether a splint or ultrasound guidance is appropriate, when to restart work or sport, and what alternatives are available if symptoms persist.