A common symptom of heart disease is shortness of breath, which is caused by the blood being deprived of the proper amount of oxygen. Another common symptom is chest pain or pain down either arm. Other symptoms are palpitations, fainting, emotional instability, cold hands and feet, frequent perspiration, and fatigue.
The pain and burning sensation in the knees is often caused due to the damage to the structures in and around the knee joint. Wear and tear of knee joint cartilage is the most common reason. The other cause can be ligament tear, bursitis. Often, the characteristic burning sensation in the knee joint is due to Iliotibial band friction. It is a common cause for knee pain in athletes. Iliotibial band originates from the hip joint and runs all the way to the knee joint.
Pain in the legs can be due to a skin problem, such as dryness and eczema, which is common in older people, or to a sluggish circulation. Arthritis in either the knee or hip joints, or even in the spine (which can put pressure on the nerves supplying the legs) could also be to blame. Alternatively, the burning could be a side effect of medication, such as drugs used to treat a heart condition or high blood pressure. So she really needs to seee her GP to get this sorted out. Sometimes a burning sensation is accompanied by jerky movements in the legs, especially at night. Known as 'Restless Leg Syndrome' this can be linked to iron deficiency and also diabetes, though in most sufferers there is no identifiable underlying cause.