After a pimple heals, it is possible for a hard lump to form due to residual inflammation, scar tissue, or excess collagen production. To help minimize or get rid of the lump, you can try the following:

1. Warm Compress: Apply a warm compress to the area to help reduce inflammation and encourage blood circulation, which may help soften the lump.
2. Gentle exfoliation: Using a mild exfoliant can help remove dead skin cells and promote skin renewal, which may help reduce the appearance of the lump over time.
3. Spot Treatments: Over-the-counter spot treatments containing ingredients like salicylic acid or benzoyl peroxide may help with any remaining acne or inflammation.
4. Moisturize: Keeping the area well-moisturized can help improve skin texture and aid in the healing process.
5. Time: In many cases, these lumps will improve on their own over time as the skin heals and renews itself.

If the lump persists, becomes painful, or shows signs of infection, it is best to consult a dermatologist for further evaluation and treatment options.