It needs to be examined before any ointment is suggested. if it’s just fungal Infection then might just do with anti fungal ointment, if any inflammatory lesion then needs to know the reason behind it. Rare cases if long term redness then might need a biopsy.

When you consume Nitrofurantoin Mono-MCR, it is suggested that you don’t take cannabis and nicotine. If you get high on cannabis, you can epileptically feel dizzy or tired, while nicotine reduces the medication's ability to be effective. Both will also higher the chances of other adverse effects like nausea and headaches.

You may be suffering from a urinary tract infection. This condition can make you feel a burning sensation and pain when passing urine. The infection occurs as a result of bacteria entering into the urinary tract system. Taking a lot of water and cranberry juice is advisable. Visit your physician for a medical examination where they will determine whether there is a need for antibiotics prescription or not. 

Burning after urination is a sign of urinary tract infection.. Drink plenty of water and consult a doctor.. Antibiotics can cure UTI. Don't delay, UTI can worsen.