Because the dragonfruit cactus is a cactus / succulent, it can more readily tolerate periods of dryness than it can tolerate long periods with too much moisture. Bear this in mind when when planting dragon fruit and choosing a location and preparing the soil and/or planting area.
Trouble in the mouth is the indication of low vitamin B complex in the body. A burning sensation in the mouth and tongue is a common effect of B vitamin deficiency. Deficiency of B complex also results in a swollen tongue, and people with this deficiency find it hard to swallow.
Rarely, proton pump inhibitors (such as omeprazole) have caused vitamin B-12 deficiency. The risk is increased if they are taken every day for a long time (3 years or longer). Tell your doctor right away if you develop symptoms of vitamin B-12 deficiency (such as unusual weakness, sore tongue, or numbness/tingling of the hands/feet).