This is Androgenic Alopecia. Permanent hair loss from the scalp, causing baldness. The patterns have a common genetic cause. Dandruff can aggravate this issue and has to be treated.
With male pattern baldness, hair loss typically occurs on the top and front of the head. Medication may prevent further hair loss. In men, this condition is also known as male-pattern baldness. Hair is lost in a well-defined pattern, beginning above both temples. Over time, the hairline recedes to form a characteristic "M" shape. This appears to be a Genetic condition or external factors like hormonal variations also can contribute. Consult a Dermatologist for the same.
Health Tips
Avoid OTC products. Maintain a high protein diet.