Early diagnostics of oncological diseases allows to undergo the treatment successfully up to complete recovery in 90% of the cases. That is why it is important to be attentive to your health and treat any disturbing symptoms that bother you as a reason to see a doctor.
If the symptoms persist for a long time, you should book a visit to a family doctor or a general practitioner for a check-up. They will refer you to an oncologist, if required.