Hydrofluoric acid burn finger swelling and pain need immediate medical attention, otherwise it may cause finger necrosis, the consequences are serious. Hydrofluoric acid is a strong corrosive acidic substances, can lead to varying degrees of skin damage, if only the surface of the skin caused by burns, and timely burns on the surface of the thorough cleaning, and timely application of drugs in the local treatment, can reduce the appropriate tissue hydrofluoric acid residue, can control the degree of burns to a certain extent, usually half a month – one month time can be recovered. But hydrofluoric acid injury to the finger swelling and pain of the specific how long to recover with the degree of burns, if the burn area is large, the degree of deeper penetration to the finger skin and subcutaneous tissues, the degree of burns is deeper and no timely cleaning of the wound, may lead to irreversible necrosis of the finger skin, affecting the recovery of the burns, the recovery time may be as long as a few months.