Over the last few months, a lump has developed on the bridge of my nose. some days it's a bit larger. if i push on it it sinks down then comes back?

Nasal lesion: It sounds like you are describing a cyst of some sort. There are a multitude of nasal cysts that can occur. It is mostly likely benign, but you really should have it evaluated. Your doctor may need to do some x-ray studies like a CT or MRI to be able to fully assess this lump/lesion to help you decide what the lesion really is and what the best option for treatment might entail. Best wishes.