Here is a deep analysis of the three main types of drops you will find at a pharmacy.
Here’s a clear, evidence-based piece on using ear drops for ear blockage caused by a cold: ear drops for ear blockage due to cold
If a cold has caused you to notice existing earwax more, drops containing carbamide peroxide or hydrogen peroxide can break down the wax. Products like Debrox Earwax Removal Drops are common OTC options. Here is a deep analysis of the three
It depends on the cause.