Hair loss is a complex process and there are many potential causes in the background.
Medical conditions, medications, stress are all known causes of hair loss.
But the vast majority of men experience androgen alopecia, or male pattern baldness to some extent over their lives.
In the case of male pattern hair loss, there are 3 major factors at play:
Genetics and hormones
Androgenetic alopecia only occurs in men with a specific genetic code in their chromosomes.
The specific gene or group of genes causing androgenetic hair loss are still unidentified, though experts believe they’re involved in synthesising male hormones — enzyme 5-alpha reductase (which converts testosterone into dihydrotestosterone or DHT) and androgen receptors found within hair follicles.
But simply carrying the gene is no guarantee of baldness.
The gene must be “expressed” to be activated, which hinges on numerous factors including age, stress levels, hormones, and more.
The genes and hormones covered in the previous section are not enough to cause androgenetic hair loss instantly.
This process takes time, during which any follicles susceptible become exposed to the problematic male hormones.
How much time does this demand?
Length varies from one person to another.
One of the most common causes of hair loss is a hereditary condition that takes effect with age, known as androgenetic alopecia. This is otherwise known as male or female pattern baldness.
Nutritional deficiencies, underlying medical issues, and stress are all possible causes of hair loss. We all shed hair on a daily basis, with the majority of people losing 50 to 100 strands every day (more on days when you shampoo your hair). But you may need treatment if you lose more than the usual amount.
An illness or fever may cause temporary hair loss, and the latter is a common sign of COVID-19. Many people experience visible hair loss a few months after getting over an illness or developing a high fever. This is hair shedding rather than hair loss, so it should grow back.
A vitamin D deficiency may lead to hair loss, as follicular stimulation is one of the bodily functions aided by vitamin D. A lack of it can stunt new hair growth and cause more shedding than usual.