Receiving a visa refusal can be frustrating and confusing. The first question is not simply whether to apply again. It is why the application was refused and what the notice or case history shows.
Different refusal grounds can have different consequences. Some cases may call for further documentation or administrative processing. Others may require an assessment of whether a waiver or another immigration path is available. Some issues may create serious barriers.
Keep the written notice and any relevant records. A new application should be considered in light of what has changed, if anything, and what the actual refusal reason was.