I have loose bowels. 我拉肚子。 I have severe hives. 我患严重麻疹。 I have a rash all over my body. 我全身发疹。 I'm allergic to fish. 我对鱼过敏。 I can't get over the itching. 我无法止痒。 I feel itchy all over my body. 我全身发痒。 I have a toothache. 我牙痛。 This tooth hurts. 这颗牙痛。