<s>[INST] My daughter started getting a rash that comes and goes on her arms and knees. It looks really red and she says it is hot. It goes away. What can it be? [/INST] Hi.dear Cynthia., Thanks for choosing Chat Doctor., Rash on arms and knees...comes and goes....usually due to., allergy to irritants....may be contact allergens, sun rays., cosmetic, elastic of wears., So evaluate it and remove the allergen.,1) Apply CALAMINE lotion on affected part in the morning times., Dexamethasone and gentamicin cream in the nighttimes.,2) Age is not mentioned... So use Levocetrizine....daily., depend upon weight of the body.,3) Antibiotics depend upon weight of the body., Ofloxacin 2 times daily.... If U tell weight of the Baby with Age . I can tell correct dosage., So follow and get good result....than </s>