Why does a cat have hard bumps on its head?

Hard bumps on cats’ heads may be caused by mosquito bites, parasitic infections, fungal and bacterial infections, cysts, tumors, or pyoderma. If the bumps do not get better for a long time or become larger, In this case, it is best to take the cat to the pet hospital for examination and treatment immediately to avoid delaying the condition.
Tips:
Usually pay attention to the hygiene of cats, bathe and deworm them regularly to avoid skin diseases.