Heel pain when walking may be caused by metatarsal fasciitis, heel bone osteochondritis dissecans, or heel bone osteophytes. 1. Metatarsal fasciitis: Metatarsal fasciitis is an inflammatory lesion of the metatarsal fascia caused by chronic strain and trauma, etc. Since the metatarsal fascia is attached to the bottom of the heel bone, patients with this disease may have symptoms of heel pain when walking. 2. Heel osteochondritis dissecans: Heel osteochondritis dissecans is a kind of disease caused by the uneven force of the muscles and ligaments attached to the plantar surface of the heel bone, leading to the pulling of the heel bone periosteum, and the patient may also have the symptom. 3. Achondroplasia: Achondroplasia, also known as bone spur, is a kind of bony proliferation formed on the edge of normal bone, and patients suffering from achondroplasia may also have the symptom of heel pain when walking. If the symptom of heel pain when walking persists without relief, please consult a doctor in time to find out the cause so as not to delay the condition.