After 7 PM don't take liquids.if taking some medicines at night just take it with sip of water .If u r having habit of taking milk at night.. Take it in the morning..
It may be due to enlargement of prostate gland or infection. If there is day time increased frequency along with burning sensation while passing urine then its infection.
Next Steps
Get urine analysis done, along with usg done, and urine flow test
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