General conservative treatment of paronychia: (1) antibiotics, including intramuscular injection, intravenous administration, local administration, etc. Advantages: it has a strong inhibitory effect on bacteria and has certain anti-inflammatory and analgesic effects. Disadvantages: It doesn't seem to have any effect on ingrown toenails caused by physical toenail penetration. (2) Anti-inflammatory and analgesic drugs, such as salicylic acid preparation, can be taken orally, ointment or injection. Suitable for use when the pain is unbearable. Disadvantages: it is ineffective for the treatment of ingrown toenails. If used for a long time, it will cause great irritation to the gastrointestinal tract. People with gastrointestinal diseases should use it with caution. (3) Urea ointment has the advantage of softening skin and toenails, which is helpful for correction. Disadvantages: it takes a long time for toenails to soften, which is very troublesome, and the effect is not good when used alone, even if toenails are softened.

Incision and drainage were performed after suppuration. Use lidocaine as nerve block anesthesia at the root of finger, and then cut it. For unilateral subcutaneous abscess, a parallel incision can be made outside the nail groove. Bilateral subcutaneous abscess needs bilateral drainage. For the abscess at the root of the nail, part or all of the nail should be removed after separation (but the basal tissue should not be damaged too much to avoid losing the ability of nail regeneration in the future), so as to fully drain the submandibular pus.