My dad has lately has been having frequent nose bleeds. What does this mean?

maybe he is gettin to hot in weathers like this my aunt has nose bleeds too.. is he allergic of something.. that might be the problem... check his surroundings

Could be high blood pressure or a very dry environment.

Maybe he's having an allergic reaction to something.

Could be high blood pressure. He may want to go to the doctor and check it out. I don't know how old he is but its best to check as you get older.

could be weather related... or it could be something more serious. He needs to go talk to the doctor. Now.

there are numerous causes for nose bleeds, most common are dry nasal tissues or picking your nose. Get him some Nasal nose spray, it's just a mild saline solution that will moisturize his nasal passages and keep them from bleeding. If that doesn't work, time to see a doctor.

If you live in a cold climate, it's probably the dry heat and the dry cold air. You can put some water into the air by boiling water, or by using a vaporizer.

IT could be aleric reaction that happens sometimes

Your father should make an appointment with an ear, nose and throat specialist. Frequent nosebleeds can be the symptoms of a number of conditions, some as minor as dry nose and others far more serious.