dd1 ( nearly 4) has been biting her nails for about a month now. It has got so bad that her fingers are swollen and often bleed, and yesterday we discovered one of her toenails ( she bites those too) was filled with pus so shje has now been put on antibiotics. We really don't know what to do - that nasty tasting nail varnish is suitable only for age 7s and above.
Any ideas or advice very gratefully received