I am really concerned that your child has an injury
Any injury due to rubbing with ground needs to be cleaned well with soap and water to remove dirt. Its good to apply antibiotic cream like neosporin
. Don't apply honey as sugar containing items can help growth of bacteria. Its advisable to apply dressing as it keeps infection from entering in. Dressing should be changed atleast daily or whenever it gets soaked very much.
Consult your doctor if it takes longer time to heal or pus starts coming from wound.
If you have not given TT at 10 years, its always advisable to give TT.
Don't worry he will be alright. Take care.