Abdominal pain is not a usual sign of a stroke. It could, however, be a sign of food poisoning or another condition such as gastritis, appendicitis, cholecystitis, intestinal infection, etc.
The appearance of your husband's hand is called “obstetrician hand”. “Obstetrician hand” combined with tingling, numbness, cramping, difficulty speaking and fatigue can happen in some neurotic disorders such as a panic attack. Pain can provoke such attacks.
In addition, low potassium causes muscle weakness. Low potassium levels can be due to: increased intake of potassium through food, vomiting and diarrhea, primary and secondary hyper-aldosteronism, prolonged usage of diuretics, diabetes mellitus, Cushing syndrome, some leukemias, etc. Several diagnostic procedures can be performed to identify the reason for the abdominal pain and low potassium:
1. Standard blood analyses (blood count, sedimentation, haemoglobin, liver status, kidney status…);
2. hormonal blood analyses: aldosteron, insulin, cortisol, ACTH;
3. electrolyte blood examinations (K , Na ), pH-value, HNaCO3-;
4. abdominal ultrasound.
You can consult an endocrinologist about the condition.