There will be hair loss on daily basis as growth and fall ratio is 80: 20. Our 20 percent hair are always in fall phase. They will fall while oiling, washing and combing. If the hair comes out in bunches or hair comes out even on slightest touch then it is considered as hair fall.
Hair is part of the body. It gets nutrition through blood. It is very important to eat healthy, drink enough amount of water on daily basis.
Oil is the excellent scalp conditioner and shampoo works as a washing medium. Do oiling 3/week and wash it 3/week.
Consult trichologist.