Any ear wound, no matter how minor, is likely to bleed a great deal.
Even if the actual wound does not cause the cat any real pain, the irritation of blood running down the ear is likely to cause him to scratch at his ear and shake his head.

Ear flaps are often bitten and scratched during fighting, and some felines, particularly farm cats, may injure their ear flaps in their usual day-to-day life.

After cleaning with saline solution, cover minor wounds with antiseptic ointment, cream or powder. If the wounds look inflamed within a few days of the injury, consult the vet, as antibiotic treatment may be required.

What to do
With someone restraining the cat, the wounds should be cleaned using saline solution. Once cleaned, it will be possible to see the extent of the damage; if this is significant, seek veterinary treatment as the wounds may need suturing.Take any cat showing any of the symptoms of irritated ears to the vet as soon as possible – immediately if you suspect a foreign body is lodged in the ear. Never attempt to remove a blockage yourself, as you may damage the cat’s ear permanently. Don’t put any liquid, ointment or other medication inside the cat’s ears unless on the direction of your vet, and don’t attempt to put any solid object inside the cat’s ear, including cotton buds, which may also damage the ear.
Discharge from the ear should not be interfered with until your vet has symptoms of diabetes mellitus are seen in queens just after they have started oestrus.

Many of the conditions associated with diabetes mellitus are also common symptoms of other, less serious, diseases or other factors. For example, an increased thirst may simply he due to your cat being fed on a dry diet.