In men often hair loss can be the start of a male pattern baldness. However please look into your diet and include plenty of protein and fruits and vegetables. Avoid junk foods and smoking. Use mild shampoo and avoid hair colour.
If you feel that the scalp is visible or the hair line is receding you need medicines to arrest further thinning of hair. There are many different serums available to help you. Please contact a dermatologist who can examine you and prescribe the appropriate skin care products and treatments. Remember, in hair loss prevention is always better than cure