Since the list of things that can cause red marks is so expansive, this is a very difficult question to answer with any surety. Plus, the way your own body reacts to laser treatments, or medications, is also unpredictable to a 100% degree. That said, we can say we have had a lot of success - without side effects - when treating patients who are eligible for our red spot removal services. So generally, the risks are low. And often, not treating a serious red mark can be more dangerous than what any medication or laser can do. The most common risks when using lasers to treat red spots will be pigmentation, inflammation, burns, bruising or irritation of some sort. These issues usually heal in due time, or they can be treated in other ways. That said, laser side effects are often rooted in operational errors. This is why it is best to use a very experienced laser technician, preferably in a doctor-led clinic like ours. The laser industry is not regulated, nor secluded to certain buyers who can get their hands on these powerful instruments. So, choosing a safe laser clinic is the onus of the consumer, unfortunately. When treating redness with medications, a long list of side effects are always a liability. However, these are often listed on their prescription labels, or told to you by your doctor or pharmacist. It is not unheard of to experience allergic reactions to some medications. Sometimes, a patient won’t know they are allergic until they try a medication. Other times, this issue is preventable, if a doctor asks the right questions in advance of writing a prescription. Please see more on our website.