I've noticed a bump at the level of the wrist on its dorsal aspect. Sometimes it hurts especially after repetitive movements

According to your description should be a ganglion cyst rising from the wrist. It is a benign cyst full of liquid coming from the wrist joint. An ecography will help to confirm the diagnosis.Surgery is indicated only when it hurts, it causes limitation of daily functions or its dimension are important. Surgery can be performed arthroscopically in selected cases in day surgery regimen.