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I can understand your concern and I have reviewed your photographs (attachment removed to protect the patient's identity). You have developed irritant contact dermatitis to baking soda. You should wash your face with plain water only and avoid using soap till the reaction gets over. Besides this, apply Eumosone cream (Clobetasol propionate) on the affected areas twice daily. Also, use a good quality moisturizing cream like on your entire face frequently and liberally like three to four times in a day.
For sunburn, use a high SPF (sun protection factor) sunscreen gel on your entire face at intervals of three to four hours during the daytime and apply Mometasone cream on the areas having sunburn twice daily. Consult a specialist doctor, discuss with him or her and take the medicine with consent. Continue the treatment for 10 days. Be careful in the future and do not use anything on your face without having complete knowledge about it. I hope this has helped you out.
The Probable causes:
Irritant reaction to baking soda.Probable diagnosis:
Irritant contact dermatitis.Regarding follow up:
Revert after ten days for further management.