Current scientific consensus is that it's unlikely that it does, however it's not completely ruled out. Risk of cancer from microwave radiation is considered to

Current scientific consensus is that it's unlikely that it does, however it's not completely ruled out. Risk of cancer from microwave radiation is considered to be thermal in nature. Unlike the background signals we are surrounded by, when making a phone call, you hold the phone to your head, meaning roughly half of the transmission energy is directed towards it. Furthermore, your brain is mostly water which absorbs microwaves well. That said, the heat generated by the absorption results in a very minimal increase in temperature, which is carried away by blood flow. Nerves are particularly sensitive to microwave burns, but this it observed at higher intensities.