If your toe hurts, you should consider that your nail is hyperplastic and thickened due to grey nail, which causes nail fungus by pressing on the nail bed. The first thing you should do is anti-infection treatment, you can apply some topical creams with anti-infection and anti-inflammatory effects, such as ofloxacin gel or fusidic acid cream, compound polymyxin b cream. There are many medications available to treat nail fungus, but the most commonly used are oral terbinafine hydrochloride tablets and itraconazole capsules. It is important to note that these drugs have a certain effect on liver function, and long-term use requires regular monitoring of liver function to avoid causing liver damage. You can also apply topical drops to treat onychomycosis, such as amorolfine hydrochloride application, both of which have certain therapeutic effects.