The foot has an abnormally high arch, causing the toes to curl downward.
Medical records and physical examination findings are central to establishing the level of your condition. For the highest rating, an examiner would need to document marked contraction of the plantar fascia, a dropped forefoot, hammer toe deformity of all toes, very painful callosities, and marked varus deformity of the foot. For the middle rating, records should show that all toes tend toward dorsiflexion, that dorsiflexion at the ankle is limited to a right angle, that the plantar fascia is shortened, and that there is marked tenderness under the metatarsal heads. For the 10% level, findings of great toe dorsiflexion, some limitation of ankle dorsiflexion, and definite tenderness under the metatarsal heads would be relevant.
In all cases, imaging such as X-rays may help show structural changes. Statements from you or people who know you describing how foot pain or deformity affects walking, standing, and daily activities can also reflect the severity of your symptoms.
Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.