The cheeks of my baby who is almost 3 months old are really irritated, it's like eczema but there is liquid coming out.

It is important to gather more information in order to determine the cause of the irritation on your baby's cheeks. Some factors to consider are whether this is the first time it has happened, possible triggers, changes in diet or exposure to animals or products. It is also important to observe if there are other affected areas on the body and the characteristics of the liquid coming out. In the meantime, some measures you can take include applying cool compresses, using unscented moisturizing creams, using gentle, unscented soap for laundry, keeping nails short, and ensuring your baby is not overheated. Hydrocortisone cream may also be used to reduce redness, itching, and irritation. If you have more questions, feel free to reach out for further guidance.