Pressure in the ear canal:
This usually happens when the ear tip presses too tightly against the canal walls. Many musicians choose tips that are too large, assuming they offer better hold. However, excessive pressure can irritate the sensitive skin, causing issues such as moisture or itching.
Pressure or suction on the eardrum:
Inserting in-ear headphones can create air pressure imbalances. If the ear tips are too large, the pressure equalisation is hindered. Gently move the earphones to balance the pressure faster.