16. Myasthenia gravis : It is an autoimmune disorder in which the body produces antibodies that block the voluntary muscle cells from receiving messages from the nerve cells. This causes muscle weakness and excessive fatigue.
17. Anaemia : Pernicious anaemia is a condition in which the body can’t make enough red blood cells because it does not have enough vitamin B12. Vitamin B12 deficiency causes nerve damage that then causes tingling sensation in hands and feet, muscle weakness, and loss of reflexes.
18. Post polio syndrome : It is a condition that affects polio survivors. The symptoms include weakening in the muscles that were previously affected by polio infection, fatigue and gradual decrease in the size of the muscles, as also increasing skeletal deformities. Although it is rarely life threatening, it negatively affects the quality of life as the affected person is unable to function independently.