Hi...rather eating well....what is more important at this age is his activity and weight range. If that is good, don't worry about quantity of food. Lump under the arm could be a swollen
lymph node and I suggest you see a paediatrician for this. The last one you mentioned is
constipation and I have few suggestions for you -
1. Natural methods are the best to relieve constipation.
2. Constipation is a risk factor for UTI
3. Maximum milk consumption per day should not exceed 300-400ml
4. Minimum 3-4 cups of fruits and vegetables to be consumed per day
5. Toilet training - that is - sitting in Indian type of lavatory daily at the same time will help a lot.
Hope my answer was helpful for you. I am happy to help any time. Further clarifications and consultations on Health care magic are welcome. If you do not have any clarifications, you can close the discussion and rate the answer. Wish your kid good health.
Dr. Sumanth MBBS., DCH., DNB (Paed).,