Since then, his head is no longer tender to touch and no more bump, but when he goes outside into the heat, he has severe, sudden
sharp, throbbing pain
. It lasts for various amounts of time. Also when he is active at all, he gets this pain. e.g. he went up & down stairs twice yesterday. He can't run even short distances. He is healthy otherwise -- no smoking, alcohol, or drugs, and is normally very active. This pain is localized and does not radiate into other areas of his head.