As an EU citizen you have the right to work, study or live in Sweden without a visa. Non EU citizens may need an entry visa to visit Sweden.
An entry visa is a permit required by persons wishing to enter Sweden for a temporary visit, for example:
Citizens from the following countries/territories require a visa when entering Sweden, check the list.
You will find all the information on how to apply for a visa at Swedish Migration Agency.
The Swedish Embassy in Riga does not handle visa or other migration issues.