A diffuse axonal injury happe­ns when the brain gets shake­n in the skull. This leads to struggles with thinking, moving, and e­ven waking up. There's no quick fix, but the­rapies like physical and occupational can assist your son. Omega-3s may be­nefit brain wellness too. 

The symptoms you described, such as stiffness, trouble speaking, cold hands and feet, and epilepsy say serious things to me. With her previous medical records including heart failure, kidney damage, and extreme variations, this may be a life-threatening issue. It is of utmost importance for her to get appropriate attention as soon as possible to receive the right treatment and the right care for her. The doctors may need to deal with the heart, kidney, and neurological issues together to make your mother feel better.

It's normal to misplace or forget things sometimes especially when life gets busy or when you are feeling overwhelmed by the things to do. Forgetting a password or misplacing your bag occasionally is usually nothing to worry about at your age. Get enough sleep, eat healthily, and manage stress to help boost memory. If you're unsure, consider keeping a task list ready or utilizing the reminders on your phone to keep you structured. But if you have worries, getting in touch with a healthcare provider is a great alternative to get yourself tested and put your mind at ease.

It feels like you might have sinusitis. Sinusitis can make one side of your head hurt, swell up your face, or affect your sight. This occurs when the sinuses in your face become infected or inflamed. Try putting warm wet towels on your face, drinking lots of water, and using saline nasal sprays. If it still hurts, contact a healthcare provider for further treatment.

Excessive vitamin B6 results in nerve issues manifesting as foot pain, numbness, and burning. Reduce the intake of foods and supplements loaded with B6. Symptoms of tingling, weakness, and trouble walking may occur. Overdose of vitamins can result in these kinds of issues. E.g., a balanced diet low in B6 including bananas, potatoes, and chicken. Allow your body to slow down while it returns to the natural cycle.

Sometimes people feel panicky, with symptoms like chest tightness, shaking in the arms and legs, and blurred vision. This is known as a panic attack, often triggered by stress, anxiety, or fear. When this happens, try to breathe slowly and deeply, focusing on calming yourself. 

Your friend could be having a panic attack. A state where the person has rapid breathing, cold hands and feet, sweaty palms, and feeling unable to move is the most common one during a panic attack. The reasons may be different but the stress or anxiety stage is often the cause. Advise your friend to breathe slowly and deeply to stay calm and composed. Offer them strong reassurance and be a steady presence to help them through it.

It may sound like you have a condition known as sinusitis. Sinuses get inflamed when spaces around the nose are filled with too much mucus due to colds, flu, allergies, or other conditions. This can lead to pain in your head especially when you lean forward or cough/sneeze; it also causes swelling in the eyes, nausea, and vomiting. To feel better try using warm packs on your face and take pain relievers that can be bought over the counter. Keep yourself well hydrated and rest enough too. In case these signs don't go away, you should see a doctor who will check them out further and treat them accordingly.