Aduh sayang, this sounds really tough both for baby and you, my heart goes out. Allergies combined with stress-triggered itching is such a nightmare to manage, especially at 8 months when they can't tell you what's wrong; I'd say this definitely needs a specialist look, maybe a pediatric dermatologist or allergy doctor, because the pattern you're describing (calm skin on limited foods, then severe scratching when stressed) might point to something specific they can help identify and treat properly. A few of us mums have found that keeping a detailed diary of exactly when the itching peaks (time of day, what triggered the stress, what she ate, even humidity) really helped doctors see the pattern and suggest targeted solutions like prescribed creams or dietary tweaks we wouldn't have thought of alone. In the meantime, keeping her nails super short and maybe soft cotton mittens during nap time (even though it's not ideal) can help prevent the bleeding while you sort out the root cause, please do push your doctor for specialist referral if they keep saying the same things, because you know your baby best. Sending strength, this phase will pass.