Is their any reason or incidence occurred behind her change in behaviour? Need to find the trigger point. Through counselling it’s possible to find out the reason behind anxiety and stress. I am an online counselor and can help her. Please get in touch with me through Practo. Do check my Facebook page and my website mentioned on it. Happy to help !

Hello Friend, Good that you are seeking a help here. These symptoms are reflection of stress in her mind. If we can handle a suitation which is against us or not in favor of us, a fear kicks inside. This fear express out through stress or anxiety as emotion and anger, frustration, shouting, hurtful voice as behaviors. Sometimes physical condition like excess heat in body , menstrual issues, acidity, food habits, hormonal changes, controlling of natural urges etc  also can influence such behaviors. Be positive. It's an addressable issue by following certain stress management techniques or self therapies, excersise, relaxation techniques, few lifestyle and counseling guidance. Feel free to reach me online for further understand and evaluation of her symptoms to recommend suitable solution. Be positive. She will be alright soon.