Being skinny and not wanting to eat is definitely one.
Have a nice day!
B because she calmly states that she doesn't take drugs instead of yelling.
The first thing you should do is see if your save then if you are talk the problem out with the person. If you are in danger walk away and find help.
The quality of family relationships, including social support (e.g., providing love, advice, and care) and strain (e.g., arguments, being critical, making too many demands), can influence well-being through psychosocial, behavioral, and physiological pathways.