Author's Note: 49/60. I have no knowledge on how you use an insulin pen or about diabetes, aside from the fact that I have the warning signs and have to regularly have exams in case I get it. Please forgive any mistakes.
Pairing: Sherlock Holmes x John Watson (can be considered pre-slash if you want, but it is platonic)
Warnings: OOC
Diabetes
When John entered the house to see Sherlock with a needle posed above his arm. Dropping the groceries, he was holding, John run and forced Sherlock to drop the needle.
"What the fuck, Sherlock? I thought we agreed no more drugs!"
Sherlock blinked up at John in confusion before his eyes cleared up.
"I was not doing drugs John."
Sherlock said calmly, but John gave him an incredulous look.
"The fuck you weren't!" John exclaims, and Sherlock rolls his eyes.
Bending down, Sherlock grabbed the needle from the floor and showed it to John. "The needle is attached to an insulin pen." Sherlock explained. John stared at him in confusion.
"I have type 1 diabetes, John. I was getting my insulin shot."
John's eyes cleared up but then they were clouded with anger.
"Sherlock Holmes! I have been living with you for over two years! Why haven't you mentioned this before? I am a doctor; I could be helping you with this!"
John grumbled angrily when he saw Sherlock's confused look and took the insulin pen and changed the needle. After he did this, he grabbed Sherlock's arm and did the injection himself.
"You need to tell me these things Sherlock. What if one day you need your insulin shot but you get too focused on a case?" John calmly explained, and Sherlock nodded in understanding.
Sherlock nodded and gave a slight smile at his friend's concern. This exactly was why John was his only friend.