prayer request for my bro

My brother went to ER last week for a terrible headache (a million times worse than a migraine). He face swelled up, his eyelids were drooping, and he was in excruciating pain. The ER team did a CT scan and some oxygen therapy and told him to follow up with a neurologist (his sxs are a textbook case of a cluster headache). Mark talked with his former med school roommate who is now a neurosurgeon in Austin (where my bro lives) for a good referral. My brother followed up with him yesterday. He agreed with his ER diagnosis and provided him with scripts for everything they did for him in the ER to keep on hand--O2 tanks, steroids, etc.--for the next attack. He said these cluster headaches come in cycles and until they figure out his cycles, there isn't much you can do preventative wise except for treat the sxs with oxygen therapy and steroids during an episode. Some pp have cycles every few weeks, some every few months, and some pp even go years between cycles but it will happen again. These attacks can last a week up to a year long. His first attack was a week long. He felt terrible and could barely speak. Although it was ruled out in the ER, he is being sent for further imaging studies today (MRI and MRA) to make absolutely sure it's not an aneurysm or a tumor. Your thoughts and prayers for my brother are much appreciated!