No home care is needed for topical anesthesia. Further care may be needed as a result of the procedure that was done. The healthcare provider will give these instructions.
Topical anesthesia has a very low risk of complications. Allergic reactions and skin rashes may occur. If too much medication is applied, it can get into the blood and cause seizures or arrhytmias. Most problems are related to the procedure, not the topical pain medication.
The American Society of Anesthesiologists recently issued a warning about the potential side effects and interactions of herbal remedies with medications used before, during, and after surgery. The group recommends discontinuing all herbal remedies and supplements at least two weeks before planned surgery.