Better description? Growths is an enlargement. Where? Is it painful? Warm? What color? These are all factors to help determine what this is and what is appropriate treatment. If there is concern about these bumps see doctor to discuss diagnosis and options for possible removal.
Diagnosis. You may need to go to the doctor to be properly diagnosed but if it is something fever blister there is Denavir (penciclovir) and other otc products that can help with viral pathology's.
Not enough info. Many things can cause bumps on your lips. Some are benign, some not, and not all can be treated with otc meds. A detailed description of the bumps, e.g. If it is painful, has blister or discharge, its color, if it bleeds.... Are needed. Based on your age, you have a low risk of having cancer but cold sore, apthous ulcer, cellulitis are more common. If it is painful, try otc topical canker sore med.
Antihistamines. Over-the-counter non-sedating antihistamines like Allegra, Claritin, or Zyrtec are helpful for persistent hives while sedating antihistamine like Benadryl (diphenhydramine) can be helpful for acute hives. If you have persistent hive reactions consider being seen by an Allergist for further treatment and evaluation. There are many triggers of hives so determining right trigger is important moving forward.