Is there any chance of cancer if you sleep with a mobile phone near your head? Or any other problem?

First let’s know what is radiation?

In Yuki’s Kathkhotta language, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.

Basically there are two types of radiation in nature.
Ionizing, and Non Ionizing.

Ionizing radiation that has the energy to remove electrons from atoms, or break bonds. Touching human skin (made of human atoms) can alter DNA structure. Mutation is mainly due to this radiation.

And non-ionizing radiation does not have the energy to remove electrons from atoms. Since this radiation does not have that much power, it will not have any great effect on the human body.

These electromagnetic radiations constantly enter our environment. We live in it. The shorter the wavelength of the electromagnetic wave, the greater the risk of damage, meaning the breaking of atomic bonds. Beta, gamma, alpha rays are typical examples. They are ionizing radiation.

And if the wavelength is large, it will not be possible to break the inter-atomic bond. or will not harm the body. Examples of microwaves, radio waves. These are non-ionizing radiations.

Note the chart below, also in Inter’s book, it will be easy to understand.

And a little fact about ionizing and non-ionizing radiation,
Hopefully it will be clear if there is any damage to the body.

After that comes mobile towers, Wi-Fi, Bluetooth and all wireless mediums use waves of different wavelengths for data transfer. Most of which occurs through microwaves. Mobile towers, 5G or millimeter wave also transfer data through microwaves.