Is waking up with horrible leg cramps (similar to growing pains) normal?

It could be a symptom of restless leg syndrome, the best treatment is to avoid caffeine, try to reduce stress, massage the legs before sleep, take a bath before bed. If it persists for a long time, i'd recommend contacting a doctor.

Leg cramps are often a sign of magnesium, calcium and/or thiamine (vitamin B1) deficiencies. Note: "Growing Pains" is a 'B.S.' diagnosis. Growing does not cause pain. The pains in childhood that often get this ridiculous label are usually the result of various biomechanical problems that should be evaluated and treated by an appropriate specialist (e.g. a Doctor of Chiropractic, Osteopathic Physician, etc.). Best wishes.

Need to eat healthy food ... Avoid some bad habits like ????????tion ....