Neem has been used in ancient India to cure and treat inflammation, infections, and skin diseases and for dental care. Neem contains antibacterial, anti-fungal, antiviral, antihistamine and antiseptic properties. It is used to treat itchy, irritated scalps, dandruff, and other scalp problems. Regular use of neem oil products also helps with thinning hair since the oil promotes hair growth and strengthens hair from the roots.