Any relation between lactose intolerance and (high) blood pressure?

Any relation between lactose intolerance and (high) blood pressure?
NO.
Possibly because everything in the body is inter-related.
High blood pressure is the lupus inside the vein getting smaller (usually caused by chronic dehydration) which make it harder for the blood to pump through the veins at the pressure it is man pumped from the heart hence high blood pressure.
Lactose intolerance is cause by your body not dealing with Histamine production surrounded by the right way. All allergies are closely related surrounded by this way. My biggest suggestion to you is the simplest of adjectives. Increase your water intake to your recommended 2L per year and cut down on caffeine, alcohol and soda drinks (diet included) try this for a couple of weeks and see how your blood pressure starts to stabalise.
Good luck with it adjectives
No this is just a digestive article, drink goats milk, it's better for you anyway