Pain levelsfrom MS spasm, spasticity, TN, Migraine, MS hug or other invisible illnesses. can change quickly. Chronic Pain and Invisible Illness. Chronic Migraines, Chronic Illness, Chronic Pain, Fatigue Causes, Chronic Fatigue Syndrome, Adrenal Fatigue, Complex Regional Pain Syndrome, Hypermobility, Ankylosing Spondylitis