You can get spots, blackheads and whiteheads at any age and in varying severities. There can be a range of causes, which can be difficult to keep under control.
Our skin is covered in hair follicles. In a healthy hair follicle, the sebaceous gland produces a small amount of sebum, which moves up to the surface of the skin where it acts as a waterproofing agent. Hormones can cause an increase in our production of sebum.
The hair follicle can become blocked with a build-up of sticky skin cells which can form blackheads and whiteheads. This blockage can cause sebum to build up, stagnate and starve the area of oxygen which creates the ideal environment for the P. acnes bacteria to grow. As a result, the hair follicle can become red and swollen – in other words, form a spot which can then go on to develop into a pustule (with yellowy pus).