My friend has been having nosebleeds occasionally since earl

Patient: My friend has been having nosebleeds occasionally since early last year, but recently the frequency has increased quite a lot. He has also been experiencing frequent dizzy spells and nausea recently (in these two months), probably as often as once every alternate day. Would like to ask for your opinion on what might be happening to him and whether he should see a doctor, thank you!

Symptoms: Nosebleed, nausea, dizziness, loss of appetite

Doctor: