Hello, I am quite empathetic to your sufferings that the condition is even hampering your daily routine. There can be multiple possibilities of the abnormal spot. It can be a simple urticaria or vasculitis or might be a part of underlying skin infection. In my patients with such kind of problem I generally suggest to take a pain killer and anti-inflammatory tablet such as paracetamol or diclofenac for two times a day. If at all the area is increasing then you can meet a doctor to rule out any other possible cause and accordingly the best treatment. My best wishes for early recovery.