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.