Mou is 18 and has re-occurring swelling on her face. It starts with a hard lump on her lips and within a few hours her face is swollen and disfigured. This is sometimes followed by hard lumps under her feet or swollen fingers. Some doctors suggested it could be a drug reaction. Others think it could be allergy. Despite treatments the condition returns regularly. Karen's case however is slightly different. Only her face swells gets red painful and warm during early summer. The surprising factors is it occurs every year at the same time like a clockwork. Although the most plausible