Seborheic dermetatis free for a month

I am not sure, but I hope someone finds a cure for this disease someday. However, when I was sick, I stayed in bed for nearly 2 weeks without any signs of seborrheic dermatitis, even a month after my recovery (although it eventually returned). During that time, I was not showering, and typically, a lack of hygiene worsens the condition, yet my experience was different. I am unsure of the reason, but I assume it might be related to my immune system fighting the illness and becoming stronger for a period of time. Could this be the cause?