Welcome to the forums! The good news is that morphea is never going to be life threatening and although a 2003 study
showed that about 25% of cases developed one non skin related symptom and 4% two such symptoms, at follow up, NONE had developed the systemic disease.
Although I have morphea I also have bullous morphea and systemic scleroderma so my experience of methotrexate isn't really going to be a good comparison for you. I know that information says plaque morphea can begin to fade, even without treatment, between 3 to 5 years and whether it fades or not, it can improve and worsen spontaneously. You know all of this because 5 years on you're experiencing new patches. How do the original patches look? If they've faded or began to fade that might give you an idea as to how the new patches will behave over time.
I know that your disease isn't life threatening but it can still be serious, causing disfigurement and even affect your mobility. I don't expect you'd want a plaque appearing on your face or neck nor would you want a plaque to impede a joint, say knee or elbow, if the morphea also affects the underlying tissue, it could.
Whether to medicate or not is the big question asked around here and it's asked often. We all have different issues to consider, for me the key issue is quality of life, not quantity but as I have a life limiting disease that's kinda easy. I actually think it's more difficult for you, not so cut and dried! Do you wait and see how the morphea progresses, remaining free to consume alcohol and enjoy the sun but risk appearance of a high visibility plaque or curtail your vibrant social life, run the risk of side effects and all for something that might never happen anyway because remember that morphea can improve, even without treatment. Yeah, so let me know how you get on making that decision!Of course you could try the methotrexate for say 6 months as it does need time to bed in. As for **drinking, you only take the methotrexate once a week so ask your doctor how many days either side of your weekly dose you can have alcohol. I know the leaflet that comes with it says never but I have had a doctor suggest otherwise. BUT as I have also had a doctor suggest scleroderma patients are easy to cannulate, check it out for yourself! Take care and let us know what you decide.** When I say drinking, I mean moderately as within the current UK guidelines. If someone is going to binge drink a) don't take the methotrexate as they might just destroy their liver and then morphea would be the least of their worries as they turn yellow, swell up like a balloon as their body retains litre upon litre of water. I ain't joking either, I am describing what happened to an actual person.**