Hair loss and thinning hair what causing it?

nanimamas
Hey everybody i'm worried about my hair at this point , I dont know whats the problem. i did lose some weight I just turn 20 , since i was 19 i started to notice a change on my hair. I have never had a tons of hair or very thick hair but if i compare it to now i can say i did because now my hair is so different , it falls out a lot and is very thin. This are the things i do to my hair :
wash it 6 or 5 days a week with hot water
straigthen everyday with heat protector
dye my hair every 4 months or more
i rarely have my hair up or put spray or oil or mousse
my hair looks and feels very very thin, i try and put a clip or put my hair up and all of a sudden it goes down , i put my fingers through my hair and i feel my scalp a lot and my hair thin i hate it and on top of my hair in the middle i see small hair growing , i really dont know whats going on.
Hair loss and thinning hair what causing it?
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