Painless blister/lump on lower lip. should i be worried? please suggest a cure! thanks.

HSV-1: Kank-A® Mouth Pain Liquid is ideal for treating canker sores and other abrasions inside the mouth. Herpes simplex virus type 1 can infect multiple sites of the body, including the oral cavity and perioral area. Recurrent herpes labialis is generally associated with less severe clinical symptoms and a shorter duration of illness than primary disease. Antivirals topical or oral might be needed.