De Quervain's Disease in the Acute Phase:a Study Aimed at Evaluating the Effectiveness of Standard Physiotherapy Treatment (HANDGUIDE), Compared to Experimental Treatment After Performing Ultrasound-guided Infiltrative Therapy.

-the experimental group will carry out a program of eccentric exercises following the infiltration and will also wear the wrist brace for 4 weeks.

-the standard group will carry out a program of generic exercises following the infiltration and will also wear the wrist brace for 4 weeks.