What Is The Cause Of Forefoot Pain?

hi . i operateda 12years old boy whio had severe forefoot pain . he had strongly positive tinel sign between first and second metatarsal .on exploration the anterior tibial atry was thrombosed and signoficant lenghthwas yellowish ans so not graftable . poserior tibia

l was good . what was it due to . what should be line of investagation . artery ligated and sent for histopath