Why I Have Persistent Dry Mouth?

Question: Im seeking help for a friend in the Ukraine that cannot access medical help. the following are copy and pasted from a conversation with her and contains her symptoms. She did have a battle with Covid19 back in Aug-Sept, and also had a slip and fall with a back injury since then too. "in general, my head often hurts when I turn my head to the left or to the right, my head starts spinning, that is, dizziness, this happens very often, the pain in the head is in the back of the head, that is, the back of the head hurts. very often the heart hurts 2-3 times a day, the heart gives colitis to the right side, plus it hurts under the left scapula of the back and sometimes occurs as a burning sensation very fatigue, weakness and constantly wanting to sleep. I'm constantly nauseous. The pain in the chest does not go away for several days. sometimes legs and arms go numb. what worries my heart the most is that I am very worried about it. Perhaps this is due to a spinal injury, I don't know. before symptoms, all this lasts about a month. and it is very difficult to say. And even in front of the camera, if I smile, I smile through the pain, if I say something ... then in fact, it's very difficult for me to do it. I have persistent dry mouth. but when I start drinking water I start to feel sick. my body very badly perceives any liquid I am also very annoyed by the fact that my hair began to fall out a lot and also acne on my face began to appear as in a transitional age Sorry for the long length and thank you for any insight you may be able to offer

Thank you for your help and patience. Here are her answers to your questions. "How long does her chest hurt? answer. about a month. What is the characteristic of pain? answer. under the left breast colitis and pulls and shoots. Does your chest pain carry over elsewhere? answer. to the right side or back. Does stress hurt? answer. yes, when leaning down or to the side. How long does her heart hurt? answer. about a month. What makes her heart easier? answer. medicine carvolol and carvoltap. or sedatives. How old is she? answer. 25 years. Does she have DM or HTN? answer. I do not know what is this. Can she eat normally? the answer is, it's hard to eat. Is there weight loss? the answer is yes. Little!"