About two and half months ago i started experiencing first pricky skin in different spots then my skin feels like its on fire them itches like crazy then i get big welts like hives them it just disappears and its fine just happens out of no where at anyti

Chronic urticaria: You have hives. Hives lasting more than 2 months are characterized as chronic. About 95% of chronic hives are a benign but uncomfortable manifestation of autoimmune disease. The other 5% may represent a more serious condition. A board-certified allergist can perform a few tests to tell you what is going on. The allergist will work with you to provide adequate treatment. An antihistamine may help.

Likle hives: Hives are usually itchy red spots that comes and goes quickly. They can be caused by allergy, viral infections, and autoimmunity ( reacting to yourself). Antibiotics can cause a reaction as long as two weeks after stopping it and persist up to 6 months(recurrently). Foods reactions occur usually quickly after eating the food and clears in 24 hours. Autoimmune can occur sporadically for no reason.