If you want to wear a necklace or bracelet to inform medics of your conditions, meds and allergies. Certainly! Especially for allergies. There are some pretty or handsome alert jewelry on the net. Medic alert are useful in keeping your info but the jewelry aren't as nice looking, the last time I looked.
I used to have a necklace for Diabetes Type 1 and 2 bracelets for Diabetes and RA. Unfortunately, a Paramedic tore the necklace off my neck, so it wouldn't cause a problem. The bracelets, I lost somewhere.
Since then I've carried a Red and White card with large letters in my wallet that reads "Type 1 Diabetic - Insulin and Rheumatoid Arthritis(turn over)". with info on back. They sometimes look in a person's wallet to know who the patient is too. I have other medical conditions and info inside also.
Some people wear there disease on their arms in a tattoo. Some even wear T-shirts. A bit too obvious for me.
Good Luck with the jewelry or whichever else you choose.