Hi, there are many causes for increased frequency of urination like diabetes, neurological cause, BPH etc but you are a young and healthy person and based on what you have mentioned chances of this things being a cause is rare.other causes like stress, kidney stones, urinary tract infection, excessive intake of caffeine content drinks, infection of prostate can also cause increase in frequency of urination. So I suggest you to do yoga and meditation to destress, avoid caffine content drinks, get a opinion of urologist to ruleout other causes..