A small hard lump after HPV vaccination does not mean that the vaccine has not been absorbed; this condition is very common after using the vaccine. This is because after vaccination, local irritation caused by the vaccine itself and the drugs loaded with the vaccine will cause inflammatory cell infiltration and local tissue hyperplasia, which may cause redness, swelling and pain in serious cases, which are normal reactions to vaccination and do not indicate that the HPV vaccine has not been absorbed, so there is no need to worry. When this happens, you can use hot towels for external application or use Xylitol for local application in the early stage to reduce the local inflammatory reaction and promote the local hard nodules absorption, but usually it can only be reduced and complete absorption takes a long time or is very difficult.