Hi Yuk Hwee,
If you notice a changing mole, you should ALWAYS see a dermatologist who can assess your mole and determine if it is just a normal changing mole or if the mole is developing suspicious features.
While it is normal that some moles may become larger, darker or lighter over time in a harmless manner, it is still safer to leave such an assessment to a trained professional.
As a trained dermatologist who has worked in the UK as well as Asian countries, I have performed numerous skin checks on different skin types using magnifying devices to look out for suspicious features.
I am usually on the lookout for any unusual pigment network, different colours, shapes and patterns, or non-healing ulcerated or bleeding lesions. If a mole is deemed suspicious, a simple and quick biopsy can be performed to send a sample to the lab for formal testing.
