The main cause of male pattern baldness is a natural change in hormone levels. Genetic predisposition also plays a huge part on whether or not someone will develop the condition. These factors cause the gradual shrinkage of the hair follicles in the scalp, causing them to become unsuitable for hair to grow from.
There are many other factors that can cause or aggravate hair loss. These include:
- Taking certain types of medication
- Poor diet/missing nutrients (e.g. zinc and iron)