Charlie horse spasm in upper abdomen. It knocks the breathe out of me. I have to lay on the floor and massage it until the muscles loosen. What is it?

Deficiencies. Anxiety, back pain, difficulty breathing and muscle spasm can all be due to magnesium deficiency which is often present in winter with a need for vit d3 as well. Topical magnesium oil or a magnesium supplement like calms might help with 1, 000 to 10, 000 units of vit d3. Listen to your body and take what works. Avoid refined foods and sugar and improve over all health with good choices.