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This prompt is from spideyreids2003 on Ao3 – Peter has had so many concussions that it's caused him to get random headaches as a result. One day he gets one of those headaches but Tony freaks out in his sleep deprived glory that why they happen and starts rambling about WebMD saying Peter has cancer or something like that and Bruce and Peter have a good laugh after Peter's gotten his meds? I think it's a funny concept that Tony becomes a Gen Z icon when sleep deprived cause Peter has influenced him so much, hell he even starts using the Gen Z slangs.

I hope you enjoy and my apologies for any mistakes.

WebMD Says You're Dying

Tony rubbed a hand over his eyes, blinking away the tired cloud that clung to them. He blinked hard, trying to shift the film of tiredness that was setting in. He cleared his throat, giving his body a stretch. He had been working non-stop for a while now, forgoing sleep so that he could work instead. SI had a mountain of projects that need finishing and his signature on paperwork that Pepper had been bugging him about. He also had the Avengers gear that needed updates – preferably before another call came out. Stretching again and rolling his neck, Tony looked across the lab, his face softening at the sight that greeted him.

If someone had told Tony that he would be looking forward to spending lab days with a Gen Z teenager that had zero self-preservation when it came to his own wellbeing, Tony would have called them crazy. But Peter Parker had wormed in way into Tony's heart before he had time to protest it. Peter had made Tony's life better in ways that he hadn't imagined – or thought were possible. Tony wasn't sure why Peter looked up to him or wanted to hang out with him, but it was an honour to work alongside the kid. He was going to be the future and Tony couldn't wait to see what the kid would do.

Peter was currently hunched over the table that had become his, scribbling away in a notebook, textbooks spread out around him as he worked on his homework. It had become a familiar routine; Peter would work on whatever homework he had been assigned while Tony tinkered on his suits. When Peter was done, they would migrate to work on their shared project.

Tony's fond smile turned to a frown when he saw Peter wince, his hand coming up to rub at his temples. Tony stood, pushing away from the table and came over to Peter, resting a hand on his shoulder.

"Hey, kid. You okay?"

"Yeah," Peter said, tense shoulders relaxing under Tony's touch. "Just a headache."

"Another one?" Tony frowned, concern tugging in his chest. In the last few months, Peter had been getting headaches. They ranged in severity, only one of them so far sending the poor kid into a sensory overload. Tony hated seeing the kid in pain, something twisting in stomach at the sight.

"Yeah," Peter sighed. "WebMD says I'm dying."

Peter said it so flippantly, in that Gen Z deadpan way that had Tony wanting to reach out and just hug the kid until he was okay. The words though triggered something deep inside Tony, his gut clenching and the tiredness flashing away as adrenalin pumped through his body.

What if something was wrong? Headaches could be a symptom of another underlying problem. What if WebMD was right? What if Peter was dying? A cold dread filled Tony's stomach, his veins feeling as if they were filling with ice. No – no way was the kid dying on his watch. Not if he could help it.

Tony pulled out his phone, the screen lighting up at his touch.

"Kid, have you been having any other symptoms other than a headache?" Tony asked, pulling up WebMD. "Any nausea? Cramps? Weight loss? Has your appetite changed at all?"

Peter turned to face Tony; face pulled into confusion. "Ummm, no?"

Tony squinted at Peter, eyes running over him. The kid looked pale and there were some dark circles under his eyes that looked a little bloodshot. "You look pale. Have you eaten enough today? What was your water intake?" He looked down at his phone, typing in the symptoms into search bar. Results came up that made Tony's head spin. "When was the last time you slept?"

"Mr. Stark," Peter said, hand gripping the sleeve of Tony's T-shirt. "Are you really using WebMD right now?"

"You've been having headaches for months now. That's not normal kiddo," Tony said, flicking through the flood of information that was on his screen. "I need you to answer my questions okay. Is there something you aren't telling me?"

"Mr. Stark – you have a whole Medbay downstairs with actual trained doctors," Peter said. "Why are you using WebMD?"

Tony stopped scrolling and looked up at Peter. The kid was looking at him with a grin he was trying to hide.

"I –" Tony blinked and huffed. He felt the flood of panic recede as he took a deep breath, the adrenalin fading and the lack of sleep crashing back into him. He had, momentarily forgotten that he had a whole team of trained professionals at his command. "Shut up."

Peter sniggered.

Tony slipped his phone back into his pocket, reaching out to slide his fingers into Peter's curls. Peter leaned into the touch, his eyes fluttering closed as Tony's nails scraped across his scalp.

"That feels nice," Peter hummed.

Tony smirked as Peter pressed into his touch. Peter always liked this, acting like a cat, practically purring under Tony's touch. It always sent the kid to sleep when Tony did this during movie nights and it made Tony's heart tumble in his chest with fondness.

Taking another breath, Tony shoved past the tiredness and tried to think clearly. "It's just a headache, right?"

"Yeah," Peter sighed. "It's from all the concussions that I've had. Just like Doctor Banner and Doctor Strange said."

Tony let out a small huff of laughter as Peter peeked an eye open, glaring up at Tony. When the headaches had first become an issue, Tony had called on Bruce and Stephen to take a look at the kid. He didn't have to beg them. As soon as they heard it was Peter, they had cleared their schedules to run some tests.

Peter had been a champ as he sat through all their tests. Tony had stayed close by, keeping him company, and trying to distract him (and trying to distract himself if Tony was being honest). It had taken a couple of hours but finally Stephen and Bruce had told them the good news.

"He's going to be okay," Bruce said, smiling.

"The headaches are a result from the all the concussions you have had," Stephen continued. "Thanks to your advanced and accelerated healing the only side-affects you are going to have are headaches. We're going to make up a drug for you that will be strong enough for you."

"Thank you," Peter breathed out, looking as relieved as Tony felt.

"You're welcome," Stephen said, eyes twinkling.

"Just, try not to get any more concussions," Bruce said with a wry smile.

Peter had grinned sheepishly, giving them a nod.

"Hey, I think I've earned the right to worry about you," Tony said, coming back to the present.

Peter's glare turned into a dopey smile. "Yeah. Thanks for worrying about me Mr. Stark."

"Any time, kiddo," Tony said. "I love you."

"Love you too."

Happy reading :D