Hi, Minoxidil solution contains propylene glycol as a carrier. Propylene glycol is mainly resposible for allergic reactions of scalp like burning, redness, itching etc. Incase of skin irritation with minoxidil solution, one can try using minoxidil foam as its less messy to apply and doesn t irritate the scalp. To gain good results with minoxidil at least 3 to 6 month of application is required. It is also necessary to know the underlying cause of hair fall then only an optimum treatment can be prescribed. For the same, consult a dermatologist. Self prescription can be harmful at times. Take care.